MAP LAYERS |
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LAYER NAME: |
KEDRAINAGE_LINE and KEDRAINAGE_POLY |
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AUTHOR/CREATOR: |
DCW |
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ORGANIZATION: |
DCW |
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LINK URL: |
http://www.princeton.edu/~geolib/gis |
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CREATION DATE: |
1993 |
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MODIFIED BY: |
DATA AND INFORMATION MANAGEMENT UNIT UNDP_SOMALIA |
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MODIFICATION DATES: |
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ABSTRACT: |
This coverage contains
drainage features at a scale of 1: 1000000. All drainage line features have coordinate coincidence with coastlines and interior shorelines in places where they are in contact. For example, streams entering lakes end at coordinate positions that coincide with one of the coordinates describing the shoreline. |
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CONSTRAINTS: |
Acknowledgment of DCW, UNDP and ESRI would be appreciated in products derived from these data. The data should not be used for navigation or for
producing maps requiring high geodetic accuracy. |
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DATASET SIZE : |
880KB |
STATUS |
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BOUNDING
COORDINATES |
EAST: 43.9431 NORTH: 8.8044 |
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WEST: 31.9862 SOUTH -5.9274
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POSITIONAL
ACCURACY: |
The
absolute horizontal accuracy of the DCW for all features derived from
Operational Navigation Charts (ONC) is 2040 meters (6700 feet) rounded to the
nearest 5 meters at 90% Circular Error (CE), World Geodetic System (WGS84).
The
absolute horizontal accuracy of the DCW for all features derived from Jet
Navigation Charts (JNC)
is 4270 meters (14006 feet) at 90% Circular Error.
The absolute vertical accuracy of the DCW is the same as for the original ONC and JNC lithographs at 90% Linear Error (LE), Mean Sea Level (MSL).. |
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COORDINATE SYSTEM: |
DECIMAL DEGREES |
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DATUM: |
WGS 84 |
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MAP PROJECTION: |
GEOGRAPHICAL |
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FORMAT |
ARCVIEW 3.1, SHAPEFILE. |
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TABLES |
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SOURCE: |
DCW |
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SOURCE PUBLICATION
DATE: |
1996 |
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CONSTRAINTS: |
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DATASET SIZE : |
247KB |
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ATTRIBUTE RELIABILITY: |
UNKNOWN |
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STATUS: |
COMPLETE |
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FIELDS: |
SEE ATTACHED FORM |
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CONTACT NAME: |
Alex Lugadiru |
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ORGANIZATION: |
DEPHA PROJECT |
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POSTAL ADDRESS: |
c/o UNDP DDC P.O. |
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EMAIL ADDRESS: |
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TELEPHONE NO.: |
254-020-7624186/95 |
GEOGRAPHIC INFORMATION SYSTEMS (GIS) SPATIAL
OUTPUT FORMAT
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Field Name |
Field Description |
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AREA |
Area of the polygon/region in square coverage units. Computed. Positive real numbers. Source: ARCINFO |
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PERIMETER |
Perimeter of poly /region in coverage units. Computed. Positive real numbers. Source: ARCINFO |
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LENGTH |
Length of the drainage segment. |
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DRAIN_LINE |
Drainage number Internal feature number. Computed. Sequential Unique positive integer. Source: ARCINFO |
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TYPE |
Code identifying the type of drainage. Perennial = 1 Seasonal = 2 |