Marc Souris

In this page you will find some GIS datas of Thailand:

Digital elevation models, from SRTM-4:

• DEMs for whole Thailand (300 m resolution)
  
• DEMs for whole Thailand (400 m resolution)
  
• DEMs for whole Thailand (500 m resolution)
  

Meteorologial Data, 1981-2001, by month, by station or district:

• Rainfall (mm)
  
• Minimum Temperature (C°, extreme)
  
• Maximum Temperature (C°, extreme)
  
• Mean Temperature (C°)
  
• Minimum Relative Humidity (%, mean)
  
• Maximum Relative Humidity (%, mean)
  
• Mean Relative Humidity (%)
  

Land use and Land cover, 2000, from Royal Forest Department, based on Landsat 5 remote sensing cover on Thailand

• Land use
  

Streams, from topographic maps and PGIS data set

• Streams
  

All datas are free for scientific use. Please indicate the source and credit (Marc Souris, IRD) when you use it.
All datas are SAVANE and ArcView compatible. All Shapefile vector datas are in geographic decimal degrees coordinate (long, lat), in INDIAN 1954 Datum (Ellipsoid is Everest Indian).

Thailand DEMs 300 m

Thailand DEM from SRTM-4 re-interpoled at 300 m resolution

All DEMs were generated from SRTM-4 90m resolution, using the SavGIS software.
Datum is INDIAN 1954 for Thailand. Projection is UTM zone 47. Elevation is in meters above see level (SRTM-4). The files are in ASCII raster format (compatible ArcGIS). All files are zipped.
*for each file, the Y Coordinate of lower point is UTM+10000000 if in north hemisphere. You can edit the file to remove this offset

• Click on the map to download the area you are interested in (each square is a downloadable area). Each area is 800*800 pixels whith a resolution of 300 m per pixel.
  

Thailand DEMs 400 m

Thailand DEM from SRTM re-interpoled at 400 m resolution

All DEMs were generated from SRTM-4 90m resolution, using the SavGIS software.
Datum is INDIAN 1954 for Thailand. Projection is UTM zone 47. Elevation is in meters above see level. The files are in ASCII raster format (compatible ArcGIS). All files are zipped.
*for each file, the Y Coordinate of lower point is UTM+10000000 if in north hemisphere. You can edit the file to remove this offset

• Click on the map to download the area you are interested in (each square is a downloadable area). Each area is 800*800 pixels whith a resolution of 400 m per pixel.
  

Thailand DEMs 500 m

Thailand DEM from from SRTM re-interpoled at 500 m resolution

All DEMs were generated from SRTM using the SavGIS software.
Datum is INDIAN 1954 for Thailand. Projection is UTM zone 47. Elevation is in meters above see level. The files are in ASCII raster format (compatible ArcGIS). All files are zipped.
*for each file, the Y Coordinate of lower point is UTM+10000000 if in north hemisphere. You can edit the file to remove this offset

• Click on the map to download the area you are interested in (each square is a downloadable area). Each area is 800*800 pixels whith a resolution of 500 m per pixel.
  

Thailand Meteorological Datas

This information was proceded from data of Ministry of Transportation of Thailand. The red of meteorological stations cover the whole country (84 principal stations for temperature, relative humidity, pressure, ect., and 996 secondary stations for rainfall).

Principal and secondary meteorological stations in Thailand

• Temperature, by month, from 1981 to 2001, in C° (Celsius)
  

Mean of extreme temperature, 20 years in Thailand

By stations

For each station, the values represent for each month the extreme minimum of the month (Temperature Min), the extreme maximum temperature of the month (Temperature Max), and the mean temperature of the month (average of daily means). In Shapefile format, download Temperature.zip (96 Kb, compressed).

By sub-districts (Amphoe, 926 zones in 2000)

The value is calculated for each district by interpolation (to create a digital model) and geoagregation from the station data. The interpolation process is for each point a barycentric mean (inverse distance) on all neighbouring stations (maximum distance200 km), with a linear function (-0.006 °C/m) for the elevation constraint. The geoagregation calculate for each zone the extreme value (extreme minimum, extreme maximum) from the corresponding interpolated dataset.

Initial meteo stations, interpolation, geoaggregation process (SavGIS GIS)

In Shapefile format, download AmphoeTempShapefile.zip (4.2 Mb, compressed). This compressed file containt two Shapefile, one for Maximum Temperature, one for Minimum Temperature.

In Exel format, without co-ordinates, download AmphoeTempExel.zip (3.8 Mb, compressed).