| Administrative Units | countries | Country Borders | The delineation of international borders have been taken from ESRI data base and may not be very accurate. |
| Observation Network | stations.meteo | Meteorological Stations | Precipitation stations are those stations from where daily rainfall figures were reported.
Some of these stations are morre fully equipped meteorological stations, others have just rain gauges.
In most cases, raingauges are manually read once a day. Stations reporting to international agencies are used by DWD (German weather services) for calculation of GPCC data and by US National Oceanic and Atmospheric Administration (NOAA) for the correction of daily rainfall estimates based on remote sensing data. |
| Nature Protection | area.protected.iucn | Protected areas - IUCN | Protected areas - national, with IUCN classification have a major overlap with the protected areas according to international conventions.
The data source is http://protectedplanet.net and data in the DSS should be regularly updated. |
| Nature Protection | area.protected.rwb | Protected areas - RWB | These are protected areas according to international conventions other than IUCN, like RAMSAR or UNESCO. Most, but not all of them, are also classified by IUCN.
The data source is http://protectedplanet.net and data in the DSS should be regularly updated. |
| Administrative Units | capitals | Capitals | National and provincial capitals within the basin are shown together with the name of their administrative unit (province or federal state) and a classification of their city population (but not the precise population number). |
| Terrain | dtm.30s | DTM medium resolution | The Digital Terrain Model (DTM) of 30 arcsecs resolution is based on the SRTM of 3 arcsecs resolution. One arcsec in north-south direction is equivalent to about 30 m. SRTM (Shuttle Radar Topography Mission) has been performed in February 2000 on board of satellite Space Shuttle Endeavour. It measures the surface, which could be as well dense vegetation or houses, and not necessarily the ground. |
| Water | floodplains | Floodplains | Floodplains are areas which are seasonally inundated. They are a mayor component of the hydrological system of Lake Chad basin. Original floodplain extends were drawn from topographic maps, but more accurate borders should be compiled in the future from classified remote sensing data like "SWB" (Small Water Bodies) product. |
| Water | water.quality.gw | Ground Water Quality | Ground Water Quality |
| Nature Protection | area.protected.noiucn | Protected areas - no_IUCN | Most of the protected areas on national level, but without IUCN classification, are forest reserves in Nigeria and CAR.
The data source is http://protectedplanet.net and data in the DSS should be regularly updated. |
| Terrain | dtm.shade.30s | Hill shades DTM | Hill shades for the DTM of 30 arcsecs resolution have been generated to be overlayed with the terrain model and give it a more "map-like" appearance. |
| Water | isohyet | Isohyets 1980-2007 | The mean annual isohyets 1980-2007 were calculated on the basis of "GPCC Full Data Product" It would be better if the isohytes could be generated automatically from the database. This would permit to select different annual periods as well as monthly isohyets. |
| Water | reservoirs | Reservoirs | Reservoirs show the shoreline at maximum extent.
Both existing and known planned reservoirs located in Lake Chad Basin are shown. Reservoir and and river names are available, further information is contained in the "dams" layer. |
| IWRM | oil-pipeline | Oil Pipeline | |
| Water | basin.surface.sub1 | Sub Basins | |
