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Geology/OIINK_LandSurfaceTopography (MapServer)

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Service Description: Geological and Geophysical Maps of the Illinois Basin-Ozark Dome Region, Map 1: Land Surface Topography

Map Name: Land Surface Topography


All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers: Description: This map is a digital elevation model at 3× vertical exagger- ation that displays the present-day ground surface elevation in shaded relief (Figure 1). It shows standard color represen- tations for elevation. Several key features are prominent on the map: • Topographic manifestations of subsurface structure, for example, the contrast between (1) the highland of the Ozark Plateau and (2) the lowland of the Illinois Basin, (3) the highland associated with the “crustal bridge” separating the Reelfoot Rift from (4) the southwestern end of the Rome Trough (see also Map 8), (5) the termination of the Mississippi Embayment (see also Map 4), and the abruptness of the borders of the Ozark Plateau. Compare these topographic expressions with the subsurface structures on Maps 5 through 8. • Pleistocene landscape features, such as (6) the Wis- consinan moraines of Illinois and Indiana. These and other Pleistocene features are shown on Map 4. • The major drainages of the Midcontinent (Missouri, Mississippi, Ohio, Illinois) and their relation to regional-scale topographic features.

Copyright Text: Illinois State Geological Survey, Prairie Research Institute, Univeristy of Illinois Urbana-Champaign

Spatial Reference: PROJCS["Earthscope",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["false_easting",0.0],PARAMETER["false_northing",0.0],PARAMETER["central_meridian",-88.8205],PARAMETER["standard_parallel_1",37.61985],PARAMETER["standard_parallel_2",40.8796],PARAMETER["latitude_of_origin",39.2497],UNIT["Meter",1.0]]

Single Fused Map Cache: false

Initial Extent: Full Extent: Units: esriMeters


Document Info: Supports Dynamic Layers: true

MaxRecordCount: 1000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, AMF, geoJSON

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryDomains   Find   Return Updates   Generate KML