Land Cover Raster 2008 [Pennsylvania--Philadelphia] {2008} Full Details

Full Details

Title:

Land Cover Raster 2008 [Pennsylvania--Philadelphia] {2008}

Description:

High resolution land cover dataset for Philadelphia. 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 ten square feet. The primary sources used to derive this land cover layer were 2008 Orthophotography and 2008 LiDAR LAS data. Ancillary data sources included GIS data (building footprints, road polygons, and hydrography) provided by City of Philadelphia. This land cover dataset is considered current as of 2008. Object-based image analysis techniques (OBIA) were employed to extract land cover information using the best available remotely sensed and vector GIS datasets. OBIA systems work by grouping pixels into meaningful objects based on their spectral and spatial properties, while taking into account boundaries imposed by existing vector datasets. Within the OBIA environment a rule-based expert system was designed to effectively mimic the process of manual image analysis by incorporating the elements of image interpretation (color/tone, texture, pattern, location, size, and shape) into the classification process. A series of morphological procedures were employed to insure that the end product is both accurate and cartographically pleasing. No accuracy assessment was conducted, but the dataset was subject to a thorough manual quality control. More than 30700 corrections were made to the classification.

Creator:

Pennsylvania--Philadelphia

Provider:

Pennsylvania Spatial Data Access (PASDA)

Resource Class:

Imagery

Resource Type:

Raster data

Date Issued:

2008

Place:

Pennsylvania--Philadelphia

Access Rights:

Public

Format:

File

Language:

English

Date Added:

2023-02-22