| Title
|
Perennial Inland Water Areas of the World (Vmap0) |
| Date
|
1997-09-01 |
| Date type
|
Creation: Date identifies when the resource was brought into existence
|
| Edition
|
First edition. |
| Presentation form
|
Digital document: Digital representation of a primarily textual item (can contain illustrations
also)
|
| Abstract
|
Perennial inland water areas of the world extracted from Vector Map Level 0 and converted to Arc/Info format by FAO/GIS.
Vector Map (VMap) Level 0 is an updated and improved version Digital Chart of the World (DCW).
|
| Purpose
|
Base map. The VMap Level 0 database provides worldwide coverage of vector-based geospatial data which can be viewed at 1:1,000,000
scale. It consists of geographic, attribute, and textual data. . VMap Level 0 includes GIS layers for road and rail networks,
drainage systems, utility networks, airports, elevation contours, coastlines, international boundaries and populated places.
|
| Status
|
On going: Data is continually being updated
|
| Descriptive keywords
|
Inland Water . |
| Descriptive keywords
|
World (place). |
| Spatial representation type
|
Vector: Vector data is used to represent geographic data
|
|
|
| Language
|
English |
| Character set
|
UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
|
| Topic category code
|
Inland waters |
|
|
| Supplemental Information
|
The major differences between VMAP0 and the DCW are the elimination of the gazette layer, addition of bathymetric data
and updated political boundaries. The data structure is originally Vector Product Format (VPF) to US Military Standard
(MIL-STD-2407) which is compliant with the international standard, Digital Geographic Information Exchange Standard (DIGEST)
Annex C. The VMap Level 0 feature and attribute content is defined in the US Military Specification for VMap Level 0(MIL-V-89039).
|