ArcGIS REST Services Directory
JSON

Layer: Land Surface Forms (ID: 2)

Name: Land Surface Forms

Display Field:

Type: Raster Layer

Geometry Type: null

Description: The land surface forms were identified using the method developed by the Missouri Resource Assessment Partnership (MoRAP). The MoRAP method is an automated land surface form classification based on Hammond’s (1964a, 1964b) classification. MoRAP made modifications to Hammond’s classification, which allowed finer-resolution elevation data to be used as input data and analysis to be made using 1 km2 moving window (True, 2002; True and others, 2000). While Hammond’s methodology was based on three variables, slope, local relief, and profile type, MoRAP’s methodology uses only slope and local relief (True, 2002). Slope is classified as gently sloping or not gently sloping using a threshold value of 8%. Local relief is classified into five classes (0-15m, 16-30m, 31-90m, 91-150m, and >150m). Slope classes and relief classes were subsequently combined to produce eight land surface form classes (flat plains, smooth plains, irregular plains, escarpments, low hills, hills, breaks/foothills, and low mountains). Sayre and others (2009) further refined the MoRAP methodology to identify a new land surface form class, “high mountains/deep canyons”, by using an additional local relief class (>400 m). The Africa implementation used a 90-meter elevation dataset which was created by void-filling and re-sampling the 30-meter SRTM elevation data provided by the National Geospatial- Intelligence Agency.

Definition Expression: N/A

Copyright Text: USGS, USAid

Default Visibility: false

MaxRecordCount: 0

Supported Query Formats: JSON, AMF, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: false

Supports Statistics: false

Has Labels: false

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Extent:
Drawing Info: Advanced Query Capabilities:
HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeNone

Type ID Field: null

Fields: None


Supported Operations:   Query   Generate Renderer   Return Updates