[Gdal-dev] Shapfiles and Projections

[Matt Wilkie]

Dean Mikkelsen wrote:
> Hi everyone,
>  
> The second link sometimes appears dead, but here is cut-and-paste from 
> the document.

There are some new optional additions described here 
http://tinyurl.com/ypsgn4. The additions are:

* .atx — An .atx file is created for each shapefile or dBASE attribute 
index created in ArcCatalog. ArcView GIS 3.x attribute indexes for 
shapefiles and dBASE files are not used by ArcGIS. A new attribute 
indexing model has been developed for shapefiles and dBASE files.

* .ixs — Geocoding index for read-write shapefiles.

* .mxs — Geocoding index for read-write shapefiles (ODB format).

I've not seen the format of these extra files defined or specified 
anywhere though I first heard about them in 2001.

Thanks to the prompting of this thread I've put together a summary of 
the extensions at http://trac.osgeo.org/gdal/wiki/UserDocs/Shapefiles

cheers,


-- 
matt wilkie
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