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Convert from shape to gmt use this example code : ogr2ogr -f "GMT" Hudson_bounds.gmt Hudson_bounds.shp


A way to do this is with a "reclass" map, set up to classify the continuous data into fixed categories. The format of the reclass file might be: GRASS 7.0.0 (WGS84):~ >cat concensus_reclass.txt 0.000000 thru 0.059999 = 1 0.060000 thru 0.333332 = 2 0.333333 thru 0.666666 = 3 0.666667 thru 1.0 = 4 Your color rules file will be changed to: 1 238:238:238 ...


You might as well make a DEM/TIN (using ArcGIS) of the shapefile you have. That will give you the DEM you need to convert to GMT format. After a quick Google search, I found a couple of links.. convert SRTM30 data to grd Shapefile to GMT DEM file Also check the this PDF, mostly after the 15th Page - GMT and Gridded Datasets There is a clear cut ...


Try using this tool: http://www.ldeo.columbia.edu/res/pi/MB-System/ It can convert GMT grid to ascii, then you can use other software, like FME, to convert to esri grid. (Found this info in the following pdf, chapter 3.3.2: ...

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