SurfGeo24k_Basemaps (Map Service)
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Current Version: 10.81
Service Description: USGS quadrangle basemaps to be displayed with the Surficial Geology (24k) data, published as a hosted cached tile service by MassGIS. The imagery displays at three zoom scales: 1:18,056, 1:9,028, and 1:4,514.
MassGIS downloaded a set of georeferenced tiff images for each quadrangle from
https://pubs.er.usgs.gov/publication/sim3402. These are the old-series (1944-1977 editions) topographic quadrangles (1:24,000 scale), most of which have the same contour base (10-ft contour interval) as the original geologic mapping. Paper quadrangle maps were scanned and georeferenced by the Office of the Massachusetts State Geologist for this project. Each of these images has an associated layer file which colormaps the image so that the white background becomes transparent; they should be used on top of the geologic data layers.
Map Name: SurfGeo24k_Basemaps
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Description: USGS quadrangle basemaps to be displayed with the Surficial Geology (24k) data, published as a hosted cached tile service by MassGIS. The imagery displays at three zoom scales: 1:18,056, 1:9,028, and 1:4,514.
MassGIS downloaded a set of georeferenced tiff images for each quadrangle from
https://pubs.er.usgs.gov/publication/sim3402. These are the old-series (1944-1977 editions) topographic quadrangles (1:24,000 scale), most of which have the same contour base (10-ft contour interval) as the original geologic mapping. Paper quadrangle maps were scanned and georeferenced by the Office of the Massachusetts State Geologist for this project. Each of these images has an associated layer file which colormaps the image so that the white background becomes transparent; they should be used on top of the geologic data layers.
Copyright Text: MassGIS
Spatial Reference: 102100
Single Fused Map Cache: true
Capabilities: Map,TilesOnly
Tile Info:
- Height: 256
- Width: 256
- DPI: 96
- Levels of Detail: (# Levels: 24)
- Level ID: 0 [Start Tile, End Tile]
Resolution: 156543.033928
Scale: 5.91657527591555E8
- Level ID: 1 [Start Tile, End Tile]
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- Level ID: 2 [Start Tile, End Tile]
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- Level ID: 20 [Start Tile, End Tile]
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- Level ID: 21 [Start Tile, End Tile]
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Scale: 282.124294
- Level ID: 22 [Start Tile, End Tile]
Resolution: 0.03732276770595208
Scale: 141.062147
- Level ID: 23 [Start Tile, End Tile]
Resolution: 0.01866138385297604
Scale: 70.5310735
- Format: PNG
- Compression Quality: 0
- Origin:
X: -2.0037508342787E7
Y: 2.0037508342787E7
- Spatial Reference:
102100
Initial Extent: XMin: -8205983.956206142
YMin: 5028152.148099598
XMax: -7753893.48372372
YMax: 5325886.450826898
Spatial Reference:
102100
Full Extent: XMin: -8185434.389275122
YMin: 5041685.525496293
XMax: -7774443.050654739
YMax: 5312353.073430203
Spatial Reference:
102100
Min Scale: 18055.954822
Max Scale: 4513.988705
Min LOD: 15
Max LOD: 17
Units: esriMeters
Supported Image Format Types: PNG
Export Tiles Allowed: false
Max Export Tiles Count: 100000
Document Info: - Title: Surficial Geology (24k) USGS Quad Basemaps (Tile Service)
- Author: MassGIS
- Comments:
- Subject: USGS quadrangle basemaps to be displayed with the Surficial Geology (24k) data, published as a hosted cached tile service by MassGIS.
- Category:
- Keywords: MassGIS, Massachusetts, Surficial Geology, Basemap, USGS, Topographic Quad