Impervious Cover year 1985


Identification_Information:
Citation:
Citation_Information:
Originator:Natural Lands Trust
Publication_Date:May 2006
Title:
Impervious Cover year 1985
Edition:first
Geospatial_Data_Presentation_Form:raster digital data
Online_Linkage: ftp://www.pasda.psu.edu/pub/pasda/nlt
Online_Linkage: http://www.natlands.org
Description:
Abstract:
This raster dataset has been created using the attribute field "Value" from the "Impervious Surface Area for Southeast Pennsylvania, 1985" data as originated by Toby Carlson, Penn State University (see metadata entitled "pa1985isaa_se.htm"). The average of impervious surface was then calculated for the small watersheds (see metadata entitled "smallsheds.xml"). Conservation Values were assigned based on the average impervious surface as follows:
Avg. Impervious Surface		Value
0-6					10
7-7					9
8-8					8	
9-9					7
10-10					6
11-12					5
13-14					4
15-16					3
17-18					2
19-20					1
21-100					0

This data set was created solely to calculate the impervious cover change between 1985 and 2000.

Conservation values were determined by experts gathered by Natural Lands Trust through SmartConservation®. This data set is one of several that have been combined to create an overall aquatic resources conservation value raster for the expanded piedmont ecoregion. Therefore the values were determined as a relative rank, comparable in value only to the other input aquatic resources data. Conservation value ranges from 1 - 10 with 10 being the highest value.
Purpose:
Assign conservation value to watersheds based on average impervious surface percentage from year 1985 in order to determine impervious surface change between 1985 and 2000 within the Expanded Piedmont Ecoregion of Pennsylvania.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:1985
Currentness_Reference:
ground condition
Status:
Progress:Complete
Maintenance_and_Update_Frequency:Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -78.356474
East_Bounding_Coordinate: -74.540675
North_Bounding_Coordinate: 41.491614
South_Bounding_Coordinate: 39.197635
Keywords:
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Topic Categories
Theme_Keyword:Impervious
Theme_Keyword:SmartConservation
Theme_Keyword:Expanded Piedmont
Theme_Keyword:Aquatic Resources
Theme_Keyword:Impervious surface
Theme_Keyword:imageryBaseMapsEarthCover
Theme_Keyword:environment
Place:
Place_Keyword:Piedmont
Place_Keyword:Expanded Piedmont
Place_Keyword:Pennsylvania
Access_Constraints:None
Use_Constraints:
None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person:Diane Rosencrance
Contact_Organization:Natural Lands Trust
Contact_Position:GIS Program Manager
Contact_Address:
Address_Type:mailing and physical address
Address:
1031 Palmers Mill Road
City:Media
State_or_Province:Pennsylvania
Postal_Code:19063
Country:USA
Contact_Voice_Telephone:610-353-5587
Contact_Electronic_Mail_Address:drosencrance@natlands.org
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.722
Back to Top
Data_Quality_Information:
Lineage:
Process_Step:
Process_Description:
Process:
Clip to study area
Use 'study area' as mask
Raster Calc: [ImperSur_1985] 
 	(from: \GIS\Impervious_Surface\1985)
Save as: "'study area'_ImpSu_1985"
In \'Study area'\Individual_grid\impervious_surface_1985\

Convert to Polygon
input: "'study area'_ImpSu_1985"
field: value
save as: "'study area'_Impervious_1985"
in \'study area'\Vector_Data\impervious_surface\conversion_from_Raster\

Intersect with ordered watersheds
Input: "'study area'_Impervious_1985"
Overlay: "OrderedWshed_'study area'"
Save as: "'study area'_Impervious_1985_By_Wshed"
In: \'study area'\Vector_Data\Impervious surface 1985\intersect with watersheds\

Calculate area of impervious surface
Add fields:
	"SQM_Imperv" - square meters of impervious surface polygons
	"Acre_Imper" - Acreage of impervious surface polygons
	"AcxImp_Per" - "Acre_Imper" x "Gridcode" - overall area of impervious surface cover value

Dissolve based on unique id of watershed
Input: "'study area' impervious_1985_by_wshed"
Field: "unique id"
Save as: "'study area' Impervious_1985_by_wshed_dissolve"
In: \'study area'\vector data\impervious surface\dissolve by wshed unique id\
	Additional fields:
		"AcxImp_Per" by sum
		"AcxImp_Per" by Average
		"Acre_wshed" by Minimum
		"Name" by first

Add attribute fields & Calculate                                                      
"SQmeters" - SQ meters of overall watershed
"Average" - Acreage of overall watershed
"ImpP_wshed" - "Sum of Acxlmp_Per"\"Acreage" (gives average impervious surface for watershed)

Convert to grid
Use 'study area'" as mask
input: "'study area'_impervious_1985_by_wshed_dissolve"
field: "ImpP_wshed"
save as: "'study area'_ImpP_1985"
in \'study area' \individual_grid\Impervious_Surface_Percent_by_wshed_1985\

Reclassify by Biological Ranks
"'study area'_ImpP_1985
Save as: "'study area'_Imper_1985" 
in \'study area'\ranked_grids\Imperious_Surface_1985\

Old Value		New Value
0-6			10
7-7			9
8-8			8	
9-9			7
10-10			6
11-12			5
13-14			4
15-16			3
17-18			2
19-20			1
21-100			0
Process_Date:2003-2005
Process_Step:
Process_Description:
Metadata imported.
Source_Used_Citation_Abbreviation:
Y:\ArcGIS_Projects\Smart Conservation Documentation\Metadata\Aquatic\riparian buffer quality expanded piedmont.xml
Process_Step:
Process_Description:
Metadata imported.
Source_Used_Citation_Abbreviation:
Y:\ArcGIS_Projects\Smart Conservation Documentation\Metadata\Aquatic\Headwater Protection.xml
Process_Step:
Process_Description:
Metadata imported.
Source_Used_Citation_Abbreviation:
Y:\ArcGIS_Projects\Smart Conservation Documentation\Metadata\Aquatic\Impervious Cover year 2000.xml
Back to Top
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method:Raster
Raster_Object_Information:
Raster_Object_Type:Grid Cell
Row_Count:8320
Column_Count:10625
Vertical_Count:1
Back to Top
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name:Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number:18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian:0.999600
Longitude_of_Central_Meridian:-75.000000
Latitude_of_Projection_Origin:0.000000
False_Easting:500000.000000
False_Northing:0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method:row and column
Coordinate_Representation:
Abscissa_Resolution:30.000000
Ordinate_Resolution:30.000000
Planar_Distance_Units:meters
Geodetic_Model:
Horizontal_Datum_Name:North American Datum of 1983
Ellipsoid_Name:Geodetic Reference System 80
Semi-major_Axis:6378137.000000
Denominator_of_Flattening_Ratio:298.257222
Back to Top
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Pied_Imp1985
Attribute:
Attribute_Label:ObjectID
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label:Value
Attribute:
Attribute_Label:Count
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Pennsylvania Spatial Data Access (PASDA)
Contact_Address:
Address_Type:mailing address
Address:
115 Land and Water Building     
City:University Park
State_or_Province:Pennsylvania
Postal_Code:16802
Country:United States
Contact_Voice_Telephone:(814) 865 - 8792
Contact_Electronic_Mail_Address:pasda@psu.edu
Resource_Description:downloadabledata
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size:1.631
Back to Top
Metadata_Reference_Information:
Metadata_Date:20060517
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Natural Lands Trust
Contact_Person:Diane Rosencrance
Contact_Position:GIS Program Manager
Contact_Address:
Address_Type:mailing and physical address
Address:
1031 Palmers Mill Road
City:Media
State_or_Province:PA
Postal_Code:19063
Country:USA
Contact_Voice_Telephone:610-353-5587
Contact_Electronic_Mail_Address:drosencrance@natlands.org
Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version:FGDC-STD-001-1998
Metadata_Time_Convention:local time
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name:ESRI Metadata Profile
Back to Top