Spatial Decision Support System using GIS based infrastructure: Planning in health & education for Ranchi district
Linkage of Spatial and Non-Spatial Data
GIS allows the linkage of spatial and non-spatial data based upon a defined relationship. A one to one relationship can be defined for each of the spatial entity with the non-spatial data. For performing the linkage operation the following steps were done:
- Identification of relation between spatial and non-spatial data such as one-to-one relationship between each of the village entity with non-spatial data for them.
- Selection of key field as linkage item which may be Census-code, polygon – id obtained after topology creation in Arc/Info or self-generated code.
- Linkage has been done in Arc View 3.2a environment of the Arc/Info coverages, as they are easily accessible through ArcVeiw by performing Join operation.
Method of Analysis
In a GIS based system any analysis can be done and its output can be shown in a much better way only by integrating non-spatial data with spatial data. The core of all analysis is:
- A combination of different parameter whether spatial or non-spatial.
- Derivation of mathematical indices from non-spatial data and representing them spatially.
In present case our main emphasis was to derive such indices which reflects the level of infrastructural development of each village, identifies the gaps so as to be taken up for development considering two basic amenities education and health.
Fig 7: Customised interface in ArcView
Simultaneously we also analysed whole district in the light of INTRA DISTRICT DISPARITIES, which includes –
- Population density.
- % SC/ST Population.
- % Literacy.
- % Distribution of workers.
- % Distribution of non-workers.
- % Distribution of agricultural workers.
- % Distribution of workers involved in Mining and Quarrying.
- % Distribution of Marginal worker.
- % Distribution of Trade and Commerce workers.
- % Distribution of Transport, Storage and Communication workers.
Finally considering all above mentioned parameter Village Development Index was calculated.