Pennsylvania Spatial Data Access

Abstract:

High resolution land cover dataset for Baltimore County/metro area, MD.
Seven land cover classes were mapped: (1) tree canopy, (2) grass/shrub, (3) bare earth, (4) water, (5) buildings, (6) roads, and (7) other paved surfaces.  The minimum mapping unit for the delineation of features was set at 104 square feet. 
The primary sources for this land cover layer were 2004 pan-sharpened 1m Ikonos satellite imagery, a normalized Digital Surface Model (nDSM) derived from 2006 LiDAR data, and LiDAR intensity data resulting from the 2006 acquisition.  Other sources of data include the City's planimetric GIS database (building footprints and road casing polygons).  The land cover classification was performed using automated object-based image analysis (OBIA) techniques in Definiens Developer/eCognition Server.
No accuracy assessment was conducted, but the dataset was thoroughly reviewed at a scale of 1:2000.  Over 370 corrections were made to the classification.

Purpose:

Urban Tree Canopy (UTC) Assessment for the Baltimore County and metro area

Supplemental_Information:

The methods used were developed by the University of Vermont Spatial Analysis Laboratory with funding from the USDA Forest Service.

Currentness_Reference:

ground condition

Use_Constraints:

None

Address:

81 Carrigan Drive

Address:

Aiken Room 220

Data_Set_Credit:

University of Vermont Spatial Analysis Laboratory

Attribute_Accuracy_Report:

No accuracy assessment was conducted, but the dataset was thoroughly reviewed at a scale of 1:2000 or greater. Over 370 corrections were made.

Logical_Consistency_Report:

Valid raster dataset.

Completeness_Report:

Complete for State College based on boundaries as of March 2009.

Horizontal_Positional_Accuracy_Report:

Unknown.

Source_Contribution:

pan-sharpened satellite imagery

Source_Contribution:

Planimetric data: building footprints

Source_Contribution:

Planimetric data: road casing polygons

Process_Description:

Object based image analysis (OBIA) using a rule-based expert system

Process_Description:

Manual corrections to land cover classification

Process_Description:

Metadata imported.

Attribute_Definition:

Internal feature number.

Attribute_Definition_Source:

ESRI

Address:

115 Land & Water Research Building

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.

Address:

81 Carrigan Drive

Address:

Aiken Center Room 220

High Resolution Land Cover, Baltimore County/Metro Area, Maryland