[GRASS-user] obtaining spatial data from shapefile maps

[Richard Peskin]

I want to use GRASS (and QGIS) for analysis of water well locations in  
a town. The basic data has been provided thru (ARCWare) shapefiles.  
While input of data to create the well location point maps is no  
problem, the shapefile format embeds the "real" spatial location data  
in a proprietary file (the .shx index files). So I can input shapefile  
data, including the dBase attributes, I can't get at the spatial  
locations; consequently I can't correct for any location errors made  
as a result of data input mistakes. Is there a way to access these  
shapefile index files using GRASS? Or is there a way I can use that  
fact that I can produce a GRASS location map of points to obtain (say  
a table of) (x,y) relative to some know location on the map? If I  
could solve this problem, I could probably move the whole well data  
set out of shapefiles and into more accessible database system, e.g.  
MySql.
thanks,
--dick peskin





____________________________________
Richard L. Peskin, RLP Consulting, Londonderry, VT
http://www.rlpcon.com
http://www.caip.rutgers.edu/~peskin



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