<?xml version="1.0" encoding="UTF-8"?>
<metadata><idinfo><citation><citeinfo><origin>Allegheny County Division of Computer Services Geographic Information Systems Group</origin><pubdate>202603</pubdate><title>Allegheny County - Building Footprints</title><geoform Sync="TRUE">vector digital data</geoform><serinfo><sername>2004 Flyover Base Data</sername></serinfo><pubinfo><pubplace>Pittsburgh, PA</pubplace><publish>Allegheny County Division of Computer Services Geographic Information Systems Group</publish></pubinfo><othercit>Data was updated as a result of a flyover in the spring of 2004. A database field has been defined for all map features named "Update Year". This database field will define which dataset provided each map feature. Map features from the 2004 update will be set to "2004". The earlier dataset map features used to supplement the area near the county boundary will be set to "1993". All new or modified map data will have the value for "Update Year" set to the actual year of update..</othercit><ftname Sync="TRUE">buildings</ftname><onlink>https://www.pasda.psu.edu</onlink></citeinfo></citation><descript><abstract>Footprints for all buildings and out buildings in Allegheny County.  Buildings are captured by following the edge of the roof line.  All near orthogonal corners are square.  Interum roof lines, such as dormers, are not shown. Minor structures such as carports, decks, patios, stairs, etc. which are part of the structure are not shown. Buildings less than 400 square feet were not captured. Special consideration was given to garages, less than 400 square feet, and were digitized if greater than 200 square feet. Building Footprints were updated as a result of a County flyover in 2004 , as a result of PAMAP aerial photography in 2006, using 2010 Pictometry Imagery and will be updated on an ongoing basis as new imagery is acquired.</abstract><purpose>Data was developed as part of the effort to establish large scale base data to support a Geographic Information System in Allegheny County.</purpose><supplinf>The original mapping (1992-1993) was created using Pennsylvania State Plane South Zone 3702; North American Horizontal Datum (NAD) 1983; North American Vertical Datum (NGVD) 1929.  As part of the GIS update the horizontal coordinate system has been adjusted to NAD 1983 High Accuracy Reference Network (HARN) 1992 Adjustment and National Geodetic Vertical Datum (NGVD) 1988.  ESRI does not have routines available for the horizontal HARN adjustment or the vertical adjustment.  To accomplish the adjustment of the existing map data an average horizontal and vertical shift was determined.  The average shift was then applied to all map data prior to updating.

The datum shift involved moving the map data a set distance.  The distance the map data was moved:
"	X=0.611'
"	Y=-0.358'
"	Z=-0.5'

Note: The available coordinate system definitions in ArcGIS 8.3 do not include HARN for Pennsylvania.  The horizontal coordinate system defined in the delivered ArcGIS 8.3 Personal Geodatabase is set to NAD83.  This will need to be redefined once ESRI incorporates HARN for Pennsylvania.</supplinf><langdata Sync="TRUE">en</langdata></descript><timeperd><timeinfo><sngdate><caldate>202603</caldate></sngdate></timeinfo><current>publication date</current></timeperd><status><progress>In work</progress><update>Continually</update></status><spdom><bounding><westbc Sync="TRUE">-80.373487</westbc><eastbc Sync="TRUE">-79.672725</eastbc><northbc Sync="TRUE">40.687091</northbc><southbc Sync="TRUE">40.180738</southbc></bounding><lboundng><leftbc Sync="TRUE">1240900.045027</leftbc><rightbc Sync="TRUE">1431411.098983</rightbc><bottombc Sync="TRUE">319427.236992</bottombc><topbc Sync="TRUE">499051.786041</topbc></lboundng></spdom><keywords><theme><themekt>ISO 19115 Topic Categories</themekt><themekey>structure</themekey></theme><place><placekey>PA</placekey><placekey>Pittsburgh</placekey><placekey>Clairton</placekey><placekey>Duquesne</placekey><placekey>McKeesport</placekey></place></keywords><accconst>Call for Details</accconst><useconst>All parties acknowledge that the data is for informational purposes only. The existing digital data is shipped as is and there is no guarantee as to its completeness or accuracy. Allegheny County Division of Computer Services Geographic Information Systems Group is not responsible for any reliance upon said data.</useconst><ptcontac><cntinfo><cntorgp><cntorg>Allegheny County Division of Computer Services Geographic Information Systems</cntorg></cntorgp><cntpos>GIS Manager</cntpos><cntaddr><addrtype>mailing and physical address</addrtype><address>621 County Office Building</address><address>542 Forbes Ave.</address><city>Pittsburgh</city><state>PA</state><postal>15219</postal><country>United States</country></cntaddr><cntvoice>(412) 350-4774</cntvoice><cntfax>(412) 350-4754</cntfax><cntemail>GIShelp@alleghenycounty.us</cntemail></cntinfo></ptcontac><native Sync="TRUE">Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4000</native><crossref><citeinfo><origin>Allegheny County Division of Computer Services Geographic Information Systems Group</origin></citeinfo></crossref><natvform Sync="TRUE">Shapefile</natvform></idinfo><dataqual><logic>Data was subject to QA/QC process by county GIS Staff at the time it was recieved - 1992-1996 and 2004 - 2005. The "&lt;coverage&gt;#" and "&lt;coverage&gt;-ID" items from the 1993 and 1994 ArcInfo coverages have been transferred to the geodatabase for all map features that have not been modified.  The purpose of the retention of this data is to allow linking of the geodatabase to the original coverages.  The values from the ArcInfo coverage item "&lt;coverage&gt;#" are loaded into the geodatabase field "SystemID".  The values from the ArcInfo coverage item "&lt;coverage&gt;-ID" are loaded into the geodatabase field "UserID".  All map features that have been modified or added during the 2004 update, with the exception of Street Centerlines, will have the value for "SystemID" and "UserID" set to zero (0).</logic><complete>As part of the 2004 update project, mapping was provided covering an area extending 1500 feet beyond the county boundary line. All planimetric, contour and DTM features were delivered in ESRI geodatabase format as County-wide seamless Feature Classes.</complete><posacc><horizpa><horizpar>All horizontal control is to NGS Second Order Class I accuracy or better and photo control points are reported on the North American Datum (NAD) 1983 U.S. Survey Feet.  The aerial photography was captured at a negative scale of 1" = 1,600' and is sufficient to produce mapping at 1" = 200' that conforms to National Mapping Accuracy Standards (NMAS).</horizpar><qhorizpa><horizpav>+/- 5 feet</horizpav></qhorizpa></horizpa><vertacc><vertaccr>All final elevations are referenced to North American Vertical Datum (NAVD) 1988.  Orthometric heights utilize GEOID 99.  The network adheres to the Federal Geodetic Control Committee Standards (FGCS) guidelines and the final constrained adjustments were made with StarNet Least Squares Adjustment program and are acceptable by the National Geodetic Survey (NGS).</vertaccr><qvertpa/></vertacc></posacc><lineage><srcinfo><srccite><citeinfo><origin>Allegheny County Division of Computer Services Geographic Information Systems Group</origin><pubdate>1992</pubdate><title>Baymont Tiles, Base Data</title><othercit>Data was created in ArcInfo Coverages on Sun 4/330 Workstations in a distributed environment.</othercit></citeinfo></srccite><srcscale>200'</srcscale><typesrc>digital tape media</typesrc><srctime><timeinfo><rngdates><begdate>Spring 1992</begdate><enddate>Spring 1993</enddate></rngdates></timeinfo><srccurr>flight time</srccurr></srctime><srccitea>Baymont Tiles</srccitea><srccontr>In the spring of 1992, Baymont Technologies entered into a contract with Allegheny County and Equitable Resources to fly the County and Equitable Resources Service Area to produce planimetric data.  Subcontractors for the project included: Howard Hartman and Associates who provided ground control for the flight; Aerial Data Reduction (ADR) who performed the photography; Centec and Michael Baker Engineers who digitized the data. Photography was produced at a scale of 1"=1500'. Mapping was stereo digitized at a scale of 1"=200'. Digital Orthophotos were not included as a deliverable.</srccontr></srcinfo><srcinfo><srccite><citeinfo><origin>Allegheny County</origin><pubdate>2005</pubdate><title>2004 Flyover</title></citeinfo></srccite><srcscale>200'</srcscale><srctime><timeinfo><sngdate><caldate>Spring 2004</caldate></sngdate></timeinfo><srccurr>flight date</srccurr></srctime><srccitea>2004 Flyover</srccitea><srccontr>Digital Globe and Michael Baker Corporation held a contract with Allegheny County to fly the County to produce digital orthophotography and to update planimetric base data for  Allegheny County.  Subcontractors for the project included: T3 Global Strategies, Sweet Solutions and Keystone Aerial Surveys.</srccontr></srcinfo><procstep><procdesc>During Y2K efforts of 1999-2000, data was transferred to Microsoft NT Server running ArcInfo 7 and was made available to county users across the network from a single location.</procdesc><procdate>2000</procdate></procstep><procstep><procdesc>Tiles edgematched to create a single seamless County coverage</procdesc><procdate>2000-2003</procdate><srcprod>County GIS Staff</srcprod></procstep><procstep><procdesc>ArcInfo coverages were created from MicroStation design files using in-house developed translation software. Allegheny County's Data Dictionary was used as the base upon which the ArcInfo structure was designed. Each coverage was subjected to review and inspection using ArcMap. Any revisions or corrections were performed in the MicroStation design files. After any corrections were performed, the files were re-translated, re-plotted and re-checked to confirm correct translations. ArcMap was then used to visually check the planimetric data against the digital orthophoto on a tile basis. The final QC step was to merge all tiles to verify the edgematch. Validation was done using MRF. The ESRI tool LOADDATA was used to convert coverages to the final deliverable format, the geodatabase.</procdesc><procdate>2004 - 2006</procdate><srcprod>Michael Baker Engineers</srcprod></procstep><procstep><procdesc>Data was loaded into ArcSDE</procdesc><srcprod>County GIS Staff</srcprod></procstep><procstep><procdesc>Data was updated by County GIS Staff using PAMAP 2006 imagery</procdesc><procdate>3rd Quarter 2007 - 3rd Quarter 2008</procdate><srcprod>County GIS Staff</srcprod></procstep><procstep><procdesc>metadata updated</procdesc><procdate>2009</procdate></procstep><procstep><procdesc Sync="TRUE">Metadata imported.</procdesc><srcused Sync="TRUE">\\Entfsh02\fsh02_dcs_user$\t094246\My Documents\Metadata\BEST\buildings.xml</srcused><procdate Sync="TRUE">2026030422</procdate><proctime Sync="TRUE">15595600</proctime></procstep></lineage></dataqual><spdoinfo><direct Sync="TRUE">Vector</direct><ptvctinf><esriterm><efeatyp Sync="TRUE">Simple</efeatyp><efeageom code="4" Sync="TRUE"/><esritopo Sync="TRUE">FALSE</esritopo><efeacnt Sync="TRUE">547492</efeacnt><spindex Sync="TRUE">TRUE</spindex><linrefer Sync="TRUE">FALSE</linrefer></esriterm></ptvctinf></spdoinfo><spref><horizsys><planar><planci><plance Sync="TRUE">coordinate pair</plance><coordrep><absres Sync="TRUE">0.000000</absres><ordres Sync="TRUE">0.000000</ordres></coordrep><plandu Sync="TRUE">survey feet</plandu></planci></planar><geodetic><horizdn Sync="TRUE">North American Datum of 1983</horizdn><ellips Sync="TRUE">Geodetic Reference System 80</ellips><semiaxis Sync="TRUE">6378137.000000</semiaxis><denflat Sync="TRUE">298.257222</denflat></geodetic><cordsysn><geogcsn Sync="TRUE">GCS_North_American_1983</geogcsn><projcsn Sync="TRUE">NAD_1983_StatePlane_Pennsylvania_South_FIPS_3702_Feet</projcsn></cordsysn></horizsys><vertdef><altsys><altres Sync="TRUE">1.000000</altres><altenc Sync="TRUE">Explicit elevation coordinate included with horizontal coordinates</altenc></altsys></vertdef></spref><eainfo><detailed Name="AlleghenyCounty_Footprints202603"><enttyp><enttypl Sync="TRUE">AlleghenyCounty_Footprints202603</enttypl><enttypt Sync="TRUE">Feature Class</enttypt><enttypc Sync="TRUE">547492</enttypc></enttyp><attr><attrlabl Sync="TRUE">FID</attrlabl><attalias Sync="TRUE">FID</attalias><attrtype Sync="TRUE">OID</attrtype><attwidth Sync="TRUE">4</attwidth><atprecis Sync="TRUE">0</atprecis><attscale Sync="TRUE">0</attscale><attrdef Sync="TRUE">Internal feature number.</attrdef><attrdefs Sync="TRUE">ESRI</attrdefs><attrdomv><udom Sync="TRUE">Sequential unique whole numbers that are automatically generated.</udom></attrdomv></attr><attr><attrlabl>Shape</attrlabl><attrdef>Feature geometry.</attrdef><attrdefs>ESRI</attrdefs><attrdomv><udom>Coordinates defining the features.</udom></attrdomv><attalias Sync="TRUE">Shape</attalias><attrtype Sync="TRUE">Geometry</attrtype><attwidth Sync="TRUE">0</attwidth><atprecis 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Sync="TRUE">SHAPE_area</attrlabl><attalias Sync="TRUE">SHAPE_area</attalias><attrtype Sync="TRUE">Double</attrtype><attwidth Sync="TRUE">19</attwidth><attrdef Sync="TRUE">Area of feature in internal units squared.</attrdef><attrdefs Sync="TRUE">ESRI</attrdefs><attrdomv><udom Sync="TRUE">Positive real numbers that are automatically generated.</udom></attrdomv><atprecis Sync="TRUE">0</atprecis><attscale Sync="TRUE">0</attscale></attr><attr><attrlabl Sync="TRUE">SHAPE_len</attrlabl><attalias Sync="TRUE">SHAPE_len</attalias><attrtype Sync="TRUE">Double</attrtype><attwidth Sync="TRUE">19</attwidth><atprecis Sync="TRUE">0</atprecis><attscale Sync="TRUE">0</attscale></attr></detailed><overview/></eainfo><distinfo><distrib><cntinfo><cntorgp><cntorg>Allegheny County Division of Computer Services Geographic Information Systems Group</cntorg></cntorgp><cntpos>GIS Manager</cntpos><cntaddr><addrtype>mailing and physical address</addrtype><address>621 County Office Building</address><address>542 Forbes Avenue</address><city>Pittsburgh</city><state>PA</state><postal>15219-2952</postal><country>USA</country></cntaddr><cntvoice>412 350-4774</cntvoice><cntfax>412 350-4754</cntfax><cntemail>GIShelp@alleghenycounty.us</cntemail></cntinfo></distrib><resdesc>Call for Details</resdesc><stdorder><digform><digtinfo><transize>85.032</transize><dssize Sync="TRUE">0.000</dssize></digtinfo></digform><ordering>Call for Details</ordering></stdorder></distinfo><metainfo><metd Sync="TRUE">2026030424</metd><metc><cntinfo><cntorgp><cntorg>Allegheny County Division of Computer Services Geographic Information Systems Group</cntorg></cntorgp><cntpos>System Supervisor, GIS</cntpos><cntaddr><addrtype>mailing and physical address</addrtype><address>621 County Office Building</address><address>524 Forbes Avenue</address><city>Pittsburgh</city><state>PA</state><postal>15219-2952</postal><country>USA</country></cntaddr><cntvoice>412 350-4774</cntvoice><cntfax>412 350-4754</cntfax><cntemail>GIShelp@alleghenycounty.us</cntemail></cntinfo></metc><metstdn Sync="TRUE">FGDC Content Standards for Digital Geospatial Metadata</metstdn><metstdv Sync="TRUE">FGDC-STD-001-1998</metstdv><mettc Sync="TRUE">local time</mettc><langmeta Sync="TRUE">en</langmeta></metainfo><Esri><ModDate>2026030425</ModDate><ModTime>07425800</ModTime><CreaDate>20260326</CreaDate><CreaTime>09473500</CreaTime><SyncOnce>FALSE</SyncOnce><SyncDate>2026030425</SyncDate><SyncTime>07425800</SyncTime><DataProperties><lineage><Process ToolSource="C:\Program Files (x86)\ArcGIS\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass" Date="2026030424" Time="151957">FeatureClassToFeatureClass I:\Data\SDE_Connections\DirectConnect\OSA@dcsgis@sqlinst1(DC).sde\dcsgis.DBO.Buildings C:\PASDA buildings.shp # "FEATURECOD 'Feature Code' true true false 2 Short 0 5 ,First,#,I:\Data\SDE_Connections\DirectConnect\OSA@dcsgis@sqlinst1(DC).sde\dcsgis.DBO.Buildings,FEATURECODE,-1,-1;UPDATE_YEA 'Year of Update' true true false 2 Short 0 5 ,First,#,I:\Data\SDE_Connections\DirectConnect\OSA@dcsgis@sqlinst1(DC).sde\dcsgis.DBO.Buildings,UPDATE_YEAR,-1,-1;NAME 'Building Name' true true false 50 Text 0 0 ,First,#,I:\Data\SDE_Connections\DirectConnect\OSA@dcsgis@sqlinst1(DC).sde\dcsgis.DBO.Buildings,NAME,-1,-1;SOURCE 'SOURCE' true true false 50 Text 0 0 ,First,#,I:\Data\SDE_Connections\DirectConnect\OSA@dcsgis@sqlinst1(DC).sde\dcsgis.DBO.Buildings,SOURCE,-1,-1;SHAPE_area 'SHAPE_area' false false true 0 Double 0 0 ,First,#,I:\Data\SDE_Connections\DirectConnect\OSA@dcsgis@sqlinst1(DC).sde\dcsgis.DBO.Buildings,SHAPE.area,-1,-1;SHAPE_len 'SHAPE_len' false false true 0 Double 0 0 ,First,#,I:\Data\SDE_Connections\DirectConnect\OSA@dcsgis@sqlinst1(DC).sde\dcsgis.DBO.Buildings,SHAPE.len,-1,-1" # C:\PASDA\buildings.shp</Process></lineage><itemProps><itemName Sync="TRUE">AlleghenyCounty_Footprints202603</itemName><nativeExtBox><westBL Sync="TRUE">1240900.045027</westBL><eastBL Sync="TRUE">1431411.098983</eastBL><southBL Sync="TRUE">319427.236992</southBL><northBL Sync="TRUE">499051.786041</northBL><exTypeCode Sync="TRUE">1</exTypeCode></nativeExtBox><itemSize Sync="TRUE">85.900</itemSize><itemLocation><linkage Sync="TRUE">file://\\psieefiler.ems.psu.edu\psieecifsvol1\Allegheny_DEP\202603\AlleghenyCounty_Footprints202603</linkage><protocol Sync="TRUE">Local Area Network</protocol></itemLocation></itemProps><coordRef><type Sync="TRUE">Projected</type><geogcsn Sync="TRUE">GCS_North_American_1983</geogcsn><csUnits Sync="TRUE">Linear Unit: Foot_US (0.304801)</csUnits><projcsn Sync="TRUE">NAD_1983_StatePlane_Pennsylvania_South_FIPS_3702_Feet</projcsn><peXml Sync="TRUE">&lt;ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.0'&gt;&lt;WKT&gt;PROJCS[&amp;quot;NAD_1983_StatePlane_Pennsylvania_South_FIPS_3702_Feet&amp;quot;,GEOGCS[&amp;quot;GCS_North_American_1983&amp;quot;,DATUM[&amp;quot;D_North_American_1983&amp;quot;,SPHEROID[&amp;quot;GRS_1980&amp;quot;,6378137.0,298.257222101]],PRIMEM[&amp;quot;Greenwich&amp;quot;,0.0],UNIT[&amp;quot;Degree&amp;quot;,0.0174532925199433]],PROJECTION[&amp;quot;Lambert_Conformal_Conic&amp;quot;],PARAMETER[&amp;quot;False_Easting&amp;quot;,1968500.0],PARAMETER[&amp;quot;False_Northing&amp;quot;,0.0],PARAMETER[&amp;quot;Central_Meridian&amp;quot;,-77.75],PARAMETER[&amp;quot;Standard_Parallel_1&amp;quot;,39.93333333333333],PARAMETER[&amp;quot;Standard_Parallel_2&amp;quot;,40.96666666666667],PARAMETER[&amp;quot;Latitude_Of_Origin&amp;quot;,39.33333333333334],UNIT[&amp;quot;Foot_US&amp;quot;,0.3048006096012192],AUTHORITY[&amp;quot;EPSG&amp;quot;,2272]]&lt;/WKT&gt;&lt;XOrigin&gt;-119214200&lt;/XOrigin&gt;&lt;YOrigin&gt;-96198500&lt;/YOrigin&gt;&lt;XYScale&gt;37163717.489134133&lt;/XYScale&gt;&lt;ZOrigin&gt;-100000&lt;/ZOrigin&gt;&lt;ZScale&gt;10000&lt;/ZScale&gt;&lt;MOrigin&gt;-100000&lt;/MOrigin&gt;&lt;MScale&gt;10000&lt;/MScale&gt;&lt;XYTolerance&gt;0.0032808333333333335&lt;/XYTolerance&gt;&lt;ZTolerance&gt;0.001&lt;/ZTolerance&gt;&lt;MTolerance&gt;0.001&lt;/MTolerance&gt;&lt;HighPrecision&gt;true&lt;/HighPrecision&gt;&lt;WKID&gt;2272&lt;/WKID&gt;&lt;/ProjectedCoordinateSystem&gt;</peXml></coordRef><copyHistory><copy source="\\psieefiler.ems.psu.edu\psieecifsvol1\Allegheny_DEP\202603\Allegheny\AlleghenyCounty_Footprints202603" dest="\\psieefiler.ems.psu.edu\psieecifsvol1\Allegheny_DEP\202603\AlleghenyCounty_Footprints202603" date="20260326" time="09473500"></copy></copyHistory></DataProperties><ArcGISFormat>1.0</ArcGISFormat></Esri><distinfo><distrib><cntinfo><cntorgp><cntorg>Pennsylvania Spatial Data Access (PASDA)</cntorg></cntorgp><cntaddr><addrtype>mailing address</addrtype><address>115 Land and Water building</address><city>University Park</city><state>Pennsylvania</state><postal>16802</postal><country>United States</country></cntaddr><cntvoice>(814) 865 - 8792</cntvoice><cntemail>pasda@psu.edu</cntemail></cntinfo></distrib><distliab>The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.</distliab></distinfo><mdLang><languageCode value="eng"/></mdLang><mdChar><CharSetCd value="004"/></mdChar><mdHrLv><ScopeCd value="005"/></mdHrLv><mdContact><rpOrgName>Allegheny County Division of Computer Services Geographic Information Systems Group</rpOrgName><rpPosName>System Supervisor, GIS</rpPosName><rpCntInfo><cntPhone><voiceNum>412 350-4774</voiceNum><faxNum>412 350-4754</faxNum></cntPhone><cntAddress addressType="both"><delPoint>524 Forbes Avenue</delPoint><delPoint>621 County Office Building</delPoint><city>Pittsburgh</city><adminArea>PA</adminArea><postCode>15219-2952</postCode><country>US</country><eMailAdd>GIShelp@alleghenycounty.us</eMailAdd></cntAddress></rpCntInfo><role><RoleCd value="007"/></role></mdContact><mdStanName>ArcGIS Metadata</mdStanName><mdStanVer>1.0</mdStanVer><distInfo><distributor><distorCont><rpOrgName>Allegheny County Division of Computer Services Geographic Information Systems Group</rpOrgName><rpPosName>GIS Manager</rpPosName><rpCntInfo><cntPhone><voiceNum>412 350-4774</voiceNum><faxNum>412 350-4754</faxNum></cntPhone><cntAddress addressType="both"><delPoint>542 Forbes Avenue</delPoint><delPoint>621 County Office Building</delPoint><city>Pittsburgh</city><adminArea>PA</adminArea><postCode>15219-2952</postCode><country>US</country><eMailAdd>GIShelp@alleghenycounty.us</eMailAdd></cntAddress></rpCntInfo><role><RoleCd value="005"/></role></distorCont><distorOrdPrc><ordInstr>Call for Details</ordInstr></distorOrdPrc><distorTran><onLineSrc><orDesc>Call for Details</orDesc></onLineSrc></distorTran></distributor><distributor><distorCont><rpOrgName>Pennsylvania Spatial Data Access (PASDA)</rpOrgName><rpCntInfo><cntPhone><voiceNum>(814) 865 - 8792</voiceNum></cntPhone><cntAddress addressType="postal"><delPoint>115 Land and Water building</delPoint><city>University Park</city><adminArea>Pennsylvania</adminArea><postCode>16802</postCode><country>US</country><eMailAdd>pasda@psu.edu</eMailAdd></cntAddress></rpCntInfo><role><RoleCd value="005"/></role></distorCont></distributor><distTranOps><onLineSrc><linkage>https://www.pasda.psu.edu</linkage></onLineSrc></distTranOps></distInfo><dataIdInfo><idCitation><resTitle>Allegheny County - Building Footprints</resTitle><date><pubDate>2017-11-01</pubDate></date><citRespParty><rpOrgName>Allegheny County Division of Computer Services Geographic Information Systems Group</rpOrgName><rpCntInfo><cntAddress><delPoint>Pittsburgh, PA</delPoint></cntAddress></rpCntInfo><role><RoleCd value="010"/></role></citRespParty><citRespParty><rpOrgName>Allegheny County Division of Computer Services Geographic Information Systems Group</rpOrgName><role><RoleCd value="006"/></role></citRespParty><datasetSeries><seriesName>2004 Flyover Base Data</seriesName></datasetSeries><otherCitDet>Data was updated as a result of a flyover in the spring of 2004. A database field has been defined for all map features named "Update Year". This database field will define which dataset provided each map feature. Map features from the 2004 update will be set to "2004". The earlier dataset map features used to supplement the area near the county boundary will be set to "1993". All new or modified map data will have the value for "Update Year" set to the actual year of update..</otherCitDet></idCitation><idAbs>Footprints for all buildings and out buildings in Allegheny County. Buildings are captured by following the edge of the roof line. All near orthogonal corners are square. Interum roof lines, such as dormers, are not shown. Minor structures such as carports, decks, patios, stairs, etc. which are part of the structure are not shown. Buildings less than 400 square feet were not captured. Special consideration was given to garages, less than 400 square feet, and were digitized if greater than 200 square feet. Building Footprints were updated as a result of a County flyover in 2004 , as a result of PAMAP aerial photography in 2006, using 2010 Pictometry Imagery and will be updated on an ongoing basis as new imagery is acquired.</idAbs><idPurp>Data was developed as part of the effort to establish large scale base data to support a Geographic Information System in Allegheny County.</idPurp><idStatus><ProgCd value="007"/></idStatus><idPoC><rpOrgName>Allegheny County Division of Computer Services Geographic Information Systems</rpOrgName><rpPosName>GIS Manager</rpPosName><rpCntInfo><cntPhone><voiceNum>(412) 350-4774</voiceNum><faxNum>(412) 350-4754</faxNum></cntPhone><cntAddress addressType="both"><delPoint>542 Forbes Ave.</delPoint><delPoint>621 County Office Building</delPoint><city>Pittsburgh</city><adminArea>PA</adminArea><postCode>15219</postCode><country>US</country><eMailAdd>GIShelp@alleghenycounty.us</eMailAdd></cntAddress></rpCntInfo><role><RoleCd value="007"/></role></idPoC><resMaint><maintFreq><MaintFreqCd value="001"/></maintFreq></resMaint><placeKeys><keyword>Duquesne</keyword><keyword>PA</keyword><keyword>McKeesport</keyword><keyword>Pittsburgh</keyword><keyword>Clairton</keyword></placeKeys><themeKeys><keyword>structure</keyword><thesaName><resTitle>ISO 19115 Topic Categories</resTitle></thesaName></themeKeys><searchKeys><keyword>Duquesne</keyword><keyword>PA</keyword><keyword>McKeesport</keyword><keyword>Pittsburgh</keyword><keyword>Clairton</keyword><keyword>structure</keyword></searchKeys><resConst><LegConsts><useLimit>The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.</useLimit><othConsts>Call for Details</othConsts></LegConsts></resConst><resConst><Consts><useLimit>All parties acknowledge that the data is for informational purposes only. The existing digital data is shipped as is and there is no guarantee as to its completeness or accuracy. Allegheny County Division of Computer Services Geographic Information Systems Group is not responsible for any reliance upon said data.</useLimit></Consts></resConst><aggrInfo><aggrDSName><citRespParty><rpOrgName>Allegheny County Division of Computer Services Geographic Information Systems Group</rpOrgName><role><RoleCd value="006"/></role></citRespParty></aggrDSName><assocType><AscTypeCd value="001"/></assocType></aggrInfo><dataLang><languageCode value="eng"/></dataLang><tpCat><TopicCatCd value="017"/></tpCat><dataExt><exDesc>publication date</exDesc><tempEle><TempExtent><exTemp><TM_Instant><tmPosition>2017-11-01</tmPosition></TM_Instant></exTemp></TempExtent></tempEle></dataExt><suppInfo>The original mapping (1992-1993) was created using Pennsylvania State Plane South Zone 3702; North American Horizontal Datum (NAD) 1983; North American Vertical Datum (NGVD) 1929. As part of the GIS update the horizontal coordinate system has been adjusted to NAD 1983 High Accuracy Reference Network (HARN) 1992 Adjustment and National Geodetic Vertical Datum (NGVD) 1988. ESRI does not have routines available for the horizontal HARN adjustment or the vertical adjustment. To accomplish the adjustment of the existing map data an average horizontal and vertical shift was determined. The average shift was then applied to all map data prior to updating. The datum shift involved moving the map data a set distance. The distance the map data was moved: " X=0.611' " Y=-0.358' " Z=-0.5' Note: The available coordinate system definitions in ArcGIS 8.3 do not include HARN for Pennsylvania. The horizontal coordinate system defined in the delivered ArcGIS 8.3 Personal Geodatabase is set to NAD83. This will need to be redefined once ESRI incorporates HARN for Pennsylvania.</suppInfo></dataIdInfo><dqInfo><dqScope><scpLvl><ScopeCd value="005"/></scpLvl></dqScope><report type="DQConcConsis"><measDesc>Data was subject to QA/QC process by county GIS Staff at the time it was recieved - 1992-1996 and 2004 - 2005. The "&lt;coverage&gt;#" and "&lt;coverage&gt;-ID" items from the 1993 and 1994 ArcInfo coverages have been transferred to the geodatabase for all map features that have not been modified. The purpose of the retention of this data is to allow linking of the geodatabase to the original coverages. The values from the ArcInfo coverage item "&lt;coverage&gt;#" are loaded into the geodatabase field "SystemID". The values from the ArcInfo coverage item "&lt;coverage&gt;-ID" are loaded into the geodatabase field "UserID". All map features that have been modified or added during the 2004 update, with the exception of Street Centerlines, will have the value for "SystemID" and "UserID" set to zero (0).</measDesc></report><report type="DQCompOm"><measDesc>As part of the 2004 update project, mapping was provided covering an area extending 1500 feet beyond the county boundary line. All planimetric, contour and DTM features were delivered in ESRI geodatabase format as County-wide seamless Feature Classes.</measDesc></report><report type="DQAbsExtPosAcc" dimension="horizontal"><measDesc>All horizontal control is to NGS Second Order Class I accuracy or better and photo control points are reported on the North American Datum (NAD) 1983 U.S. Survey Feet. The aerial photography was captured at a negative scale of 1" = 1,600' and is sufficient to produce mapping at 1" = 200' that conforms to National Mapping Accuracy Standards (NMAS).</measDesc><measResult><QuanResult><quanVal>+/- 5 feet</quanVal></QuanResult></measResult></report><report type="DQAbsExtPosAcc" dimension="vertical"><measDesc>All final elevations are referenced to North American Vertical Datum (NAVD) 1988. Orthometric heights utilize GEOID 99. The network adheres to the Federal Geodetic Control Committee Standards (FGCS) guidelines and the final constrained adjustments were made with StarNet Least Squares Adjustment program and are acceptable by the National Geodetic Survey (NGS).</measDesc></report><dataLineage><prcStep><stepDesc>ArcInfo coverages were created from MicroStation design files using in-house developed translation software. Allegheny County's Data Dictionary was used as the base upon which the ArcInfo structure was designed. Each coverage was subjected to review and inspection using ArcMap. Any revisions or corrections were performed in the MicroStation design files. After any corrections were performed, the files were re-translated, re-plotted and re-checked to confirm correct translations. ArcMap was then used to visually check the planimetric data against the digital orthophoto on a tile basis. The final QC step was to merge all tiles to verify the edgematch. Validation was done using MRF. The ESRI tool LOADDATA was used to convert coverages to the final deliverable format, the geodatabase.</stepDesc><stepSrc type="produced"><srcCitatn><resAltTitle>Michael Baker Engineers</resAltTitle></srcCitatn></stepSrc></prcStep><prcStep><stepDesc>metadata updated</stepDesc><stepDateTm>2009-01-01</stepDateTm></prcStep><prcStep><stepDesc>Data was loaded into ArcSDE</stepDesc><stepSrc type="produced"><srcCitatn><resAltTitle>County GIS Staff</resAltTitle></srcCitatn></stepSrc></prcStep><prcStep><stepDesc>During Y2K efforts of 1999-2000, data was transferred to Microsoft NT Server running ArcInfo 7 and was made available to county users across the network from a single location.</stepDesc><stepDateTm>2000-01-01</stepDateTm></prcStep><prcStep><stepDesc>Tiles edgematched to create a single seamless County coverage</stepDesc><stepDateTm>2000-20-03</stepDateTm><stepSrc type="produced"><srcCitatn><resAltTitle>County GIS Staff</resAltTitle></srcCitatn></stepSrc></prcStep><prcStep><stepDesc>Data was updated by County GIS Staff using PAMAP 2006 imagery</stepDesc><stepSrc type="produced"><srcCitatn><resAltTitle>County GIS Staff</resAltTitle></srcCitatn></stepSrc></prcStep><dataSource><srcDesc>In the spring of 1992, Baymont Technologies entered into a contract with Allegheny County and Equitable Resources to fly the County and Equitable Resources Service Area to produce planimetric data. Subcontractors for the project included: Howard Hartman and Associates who provided ground control for the flight; Aerial Data Reduction (ADR) who performed the photography; Centec and Michael Baker Engineers who digitized the data. Photography was produced at a scale of 1"=1500'. Mapping was stereo digitized at a scale of 1"=200'. Digital Orthophotos were not included as a deliverable.</srcDesc><srcScale><rfDenom>0</rfDenom></srcScale><srcCitatn><resTitle>Baymont Tiles, Base Data</resTitle><resAltTitle>Baymont Tiles</resAltTitle><date><pubDate>1992-01-01</pubDate></date><citRespParty><rpOrgName>Allegheny County Division of Computer Services Geographic Information Systems Group</rpOrgName><role><RoleCd value="006"/></role></citRespParty><otherCitDet>Data was created in ArcInfo Coverages on Sun 4/330 Workstations in a distributed environment.</otherCitDet></srcCitatn><srcExt><exDesc>flight time</exDesc><tempEle><TempExtent><exTemp><TM_Period><tmBegin date="Spring 1992"/><tmEnd date="Spring 1993"/></TM_Period></exTemp></TempExtent></tempEle></srcExt></dataSource><dataSource><srcDesc>Digital Globe and Michael Baker Corporation held a contract with Allegheny County to fly the County to produce digital orthophotography and to update planimetric base data for Allegheny County. Subcontractors for the project included: T3 Global Strategies, Sweet Solutions and Keystone Aerial Surveys.</srcDesc><srcScale><rfDenom>0</rfDenom></srcScale><srcCitatn><resTitle>2004 Flyover</resTitle><resAltTitle>2004 Flyover</resAltTitle><date><pubDate>2005-01-01</pubDate></date><citRespParty><rpOrgName>Allegheny County</rpOrgName><role><RoleCd value="006"/></role></citRespParty></srcCitatn><srcExt><exDesc>flight date</exDesc><tempEle><TempExtent><exTemp/></TempExtent></tempEle></srcExt></dataSource></dataLineage></dqInfo><Binary><Enclosure><Descript>original metadata</Descript><Data SourceMetadata="yes" OriginalFileName="source_metadata.xml" SourceMetadataDigest="5368a6ef74adb359a3f2465931af4e35" EsriPropertyType="Base64" SourceMetadataSchema="fgdc">PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4NCjxtZXRhZGF0YT4NCiAgPGlk
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