MCC was commissioned by Department of Land Development (DLD), Ministry of Agriculture to design and build spatial databases for their published soil group maps with other data layers such as administrative boundaries, main roads and streams.

Objectives:

The purpose of this project is to develop DLD Soil Information System (DLDSIS)  that allow a user to select an area of interest, retrieve the above spatial information and be able to retrieve information on soil types and their suitability level for selected crops.

System Components:

DLDSIS consists of three main components, spatial database, soil group attribute, ArcView GIS and user interface shell (Figure 1)

Fugure 1  Shell Structure

Spatial Database was created by digitizing 1:50,000 soil group maps, abministrative boundary at Tambon (sub-district level), main roads and streams.  The database covers north, central, and northeastern regions of Thailand.  They are stored as Arc/INFO coverages and ArcView shape files.

Attribute tables containing soil group names and their associate suitability levels for use in producing major crops in Thailand were created and linked with spatial database to facilitate land use planning.

DLDSIS Shell  was designed and developed in thai to allows user to select a target area either by administrative boundary from sub-district to provincial levels (Figure 2), map sheet number, or special project area.  The use can elect any theme to produce a map of the specified target area (Figure 3).  Soil suitability rating for each major crop can be assessed by selecting target area and crop choice (Figure 4).   The results area displayed on the screen and printed out as maps of various sizes.   The extent of each soil groups and its suitability level are included in the reported map (Figure 5).

Fugure 2  Select area by administrative name

 

Fugure 3  View soil group of selected area

 

Figure 4  Select crop to assess the suitability

 

Figure 5  Output map of selected area with suitability level of selected crop

Published Reports::

1. Promburom, P  and M. Ekasingh. 1996.  DLD Soil Information System: A Structural Components.  Agricultural Technical Report No. 40.   Multiple Cropping Center, Chiang Mai University, 64p. 

2. Promburom, P. and M. Ekasingh.  1996.  DLD Soil Inforamation System: A User Manual. Agricultural Technical Report No. 41.  Multiple Cropping Center, Chiang Mai University, 30p.

For more information please contact:  Panomsak Promburom

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