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I downloaded multiple zips that cover a small island from the Rhode Island Geographic Information System webpage, specifically the geographic files that make up Block Island.

Here's the source: http://www.edc.uri.edu/rigis/data/download/2011USGS/muni.aspx?ID=22

I'm trying to convert these files into .asc. From what little information I managed to find online I must make a the vector into a raster and make it a point/grid image and then save it as a .asc

I can get the point style raster image but I'm unable to save/export as the.asc.

Does anyone know how to do it? I also have geotiff and grass gis if it helps the process.

  • Why don't you use the DEM file they provide? The shapefiles don't contain more information. – AndreJ Nov 2 '14 at 8:08

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