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Impervious_Surfaces (Map Service)


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Current Version: 10.81

Service Description:

The impervious map was created using “expert systems” rulesets developed in Trimble Ecognition. These rulesets combine automated image segmentation with object based image classification techniques. In contrast with machine learning approaches, expert systems rulesets are developed heuristically based on the knowledge of experienced image analysts.  Key data sets used in the expert systems rulesets for impervious mapping included:  orthophotography (’11 and ’13), the LiDAR point cloud, and LiDAR derived rasters.

After it was produced using Ecognition, the preliminary impervious map product was manually edited by a team of photointerpreters. Manual editing corrected errors where the automated methods produced incorrect results.

The impervious surfaces map reflects the state of the landscape in fall, 2013 when countywide high resolution imagery and LiDAR collection occurred.

The impervious map has 4 classes, which are described below:

Miscellaneous quality control and processing notes:

Minimum Mapping Units:

The table below shows the nominal minimum mapping units (MMUs) for the impervious surfaces map.

Map Class

MMU

Buildings

200 square feet

Other Impervious

400 square feet



Map Name: Publish

Legend

All Layers and Tables

Layers: Tables: Description:

The impervious map was created using “expert systems” rulesets developed in Trimble Ecognition. These rulesets combine automated image segmentation with object based image classification techniques. In contrast with machine learning approaches, expert systems rulesets are developed heuristically based on the knowledge of experienced image analysts.  Key data sets used in the expert systems rulesets for impervious mapping included:  orthophotography (’11 and ’13), the LiDAR point cloud, and LiDAR derived rasters.

After it was produced using Ecognition, the preliminary impervious map product was manually edited by a team of photointerpreters. Manual editing corrected errors where the automated methods produced incorrect results.

The impervious surfaces map reflects the state of the landscape in fall, 2013 when countywide high resolution imagery and LiDAR collection occurred.

The impervious map has 4 classes, which are described below:

Miscellaneous quality control and processing notes:

Minimum Mapping Units:

The table below shows the nominal minimum mapping units (MMUs) for the impervious surfaces map.

Map Class

MMU

Buildings

200 square feet

Other Impervious

400 square feet



Copyright Text: Sonoma County Vegetation Mapping and LiDAR Consortium, Sonoma County Agricultural Preservation and Open Space District, Sonoma County Information Systems (ISD), Sonoma County Transportation and Public Works (TPW), University of Vermont Spatial Analysis Library (SAL), Tukman Geospatial LLC

Spatial Reference:
102100

Single Fused Map Cache: true

Capabilities: Map,TilesOnly,Tilemap

Tile Info:
Initial Extent:
Full Extent:
Min Scale: 1155581.108577
Max Scale: 18055.954822

Min LOD: 9
Max LOD: 15

Units: esriMeters

Supported Image Format Types: PNG

Export Tiles Allowed: false
Max Export Tiles Count: 100000

Document Info: