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Elevation_Hillshade_2005 (Map Service)


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Current Version: 10.81

Service Description: The elevation data in this service represent the "bare earth" elevation of the terrain surface without vegetation and artificial features. As a requirement for the orthorectification process of the 1:5,000 Color Ortho Imagery (2005), elevation points were compiled photogrammetrically by human operators from imagery acquired by Sanborn, Inc. in April 2005. The shape of the bare earth terrain is represented by irregularly spaced mass points, as well as by hard breaklines and soft breaklines. The spatial distribution of mass points and breaklines varies with surface roughness and compilation style.

The service also includes shaded relief (terrain) data generated from the elevation surface so that for a specific position of the sun, the values in the image represent the amount of light theoretically reflected to a position directly above the scene.

The position of the sun was chosen as follows:
  - Solar azimuth: 315 degrees measured clockwise from due north (northwest).
  - Solar elevation: 45 degrees above the horizon.

Slopes that face the direction of the sun appear highlighted and slopes that face away from the sun appear in darker shades. The data values have been scaled so that a value of 1 represents zero light reflectance, and a value of 255 represents maximum light reflectance. Shaded relief images are used in analysis, as well as making it easier visually to interpret slope, aspect, and changes in elevation. Shadows are not modeled.

Please see https://www.mass.gov/info-details/massgis-data-elevation-topographic-data-2005 for more details.

Map Name: Map3

Legend

All Layers and Tables

Layers: Tables: Description: The elevation data in this service represent the "bare earth" elevation of the terrain surface without vegetation and artificial features. As a requirement for the orthorectification process of the 1:5,000 Color Ortho Imagery (2005), elevation points were compiled photogrammetrically by human operators from imagery acquired by Sanborn, Inc. in April 2005. The shape of the bare earth terrain is represented by irregularly spaced mass points, as well as by hard breaklines and soft breaklines. The spatial distribution of mass points and breaklines varies with surface roughness and compilation style.

The service also includes shaded relief (terrain) data generated from the elevation surface so that for a specific position of the sun, the values in the image represent the amount of light theoretically reflected to a position directly above the scene.

The position of the sun was chosen as follows:
  - Solar azimuth: 315 degrees measured clockwise from due north (northwest).
  - Solar elevation: 45 degrees above the horizon.

Slopes that face the direction of the sun appear highlighted and slopes that face away from the sun appear in darker shades. The data values have been scaled so that a value of 1 represents zero light reflectance, and a value of 255 represents maximum light reflectance. Shaded relief images are used in analysis, as well as making it easier visually to interpret slope, aspect, and changes in elevation. Shadows are not modeled.

Please see https://www.mass.gov/info-details/massgis-data-elevation-topographic-data-2005 for more details.

Copyright Text: MassGIS

Spatial Reference:
102100

Single Fused Map Cache: true

Capabilities: Map,TilesOnly

Tile Info:
Initial Extent:
Full Extent:
Min Scale: 4622324.434309
Max Scale: 1128.497176

Min LOD: 7
Max LOD: 19

Units: esriMeters

Supported Image Format Types: PNG

Export Tiles Allowed: false
Max Export Tiles Count: 100000

Document Info: