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Dr. Marc Souris

Computer Sciences Researcher and GIS Developer, IRD


Thailand

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


DEMs for whole Thailand (300 m resolution)

DEMs for whole Thailand (400 m resolution)

DEMs for whole Thailand (500 m resolution)

Meteorological datas, 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 forest cover, 2000, from Royal Forest Department, based on Landsat 5 remote sensing cover on Thailand

Streams, from topographic maps and PGIS data set

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 re-interpoled at 300 m resolution

All DEMs were generated from SRTM 90m resolution, using the SAVANE system.
Datum is INDIAN 1954 for Thailand. Projection is UTM zone 47. Elevation is in meters above see level (SRTM). 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 90m resolution, using the SAVANE system.
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 SAVANE system.
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


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 (SAVANE 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).

Relative Humidity, by month, from 1981 to 2001 (in percentage)

By stations

Relative Humidity is fully time correlated with Rainfall !

The values represent for each month the extreme minimum of the month (RHumidity Min), the extreme maximum of the month (RHumidity Max), and the mean relative humidity of the month (average of daily means). All values are in percentage.
In Shapefile format, download RHumidity.zip (69 Kb, compressed)

Rainfall, by month, from 1981 to 2001 (in mm)

By stations

The values represent for each station (1080 stations for Rainfall) and for each month the total of precipitations, in mm. A value of 0.1 represent a trace of rainfall. All values are in mm.
In Shapefile format, download Rainfall.zip (487 Kb, compressed)


Thailand Land use and forest cover

Year 2000

This detailled information is from Royal Forest Department of Thailand (National Park Wildlife & Vegetation Conservation Department), and represent land use oriented to forest cover. The file cover the whole country and is made from Landsat TM satellite images (30 m resolution), with detailed type of forest or land use.

Land use in Central Thailand and Bangkok area

In Shapefile format, download Forest2000.zip (41.4 Mb, compressed). Interpretation code is in the file ForestCodes.xls.


Thailand rivers and streams

Digitized f rom topographical maps of Thailand and PSIG data set

Rivers (PSIG) and streams (TD)

Detail of streams in Bangkok and central Thailand (TD)

In Shapefile format, download Streams.zip (6 Mb, compressed).


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