MacGIS Masher

MacGIS Masher will enable you to open several different Vector and DEM formats (Table, right), edit and remove vector GIS records that you don’t need, merge DEMs at different scales, crop them to the area that you want, extract vector contours if you want, and visualize them in color or shaded relief. All this in a small and very easy to use package. But, there is a catch…

In order to use MacGIS Masher, you must install the Geospatial Data Abstraction Libraries (GDAL) from the Open Source Geospatial Foundation. These libraries are free and open source but they do require you to use the Terminal app on your computer to do the installation. Links to downloads for every system are available on the GDAL web pages. Here is a good online tutorial about how to install GDAL. Once you have successfully installed the libraries, MacGIS Masher will enable you to use them without ever having to touch the Terminal again and without having to know a single GDAL command line command. This users manual will help you get the most out of MacGIS Masher and, hopefully, you will find its capabilities reason enough to install GDAL.

MacGIS Masher is only available for Mac OS operating system. The DEM functionality can be found in my DEM Masher Program.

Download for Mac

Version History

Version 1.0.0 — 2026.02.09 Initial Release!

  • Open, visualize, edit, and delete records and/or tables from a variety of GIS vector database formats. You cannot edit the geometry information in a record but you can edit just about every other field. Use a powerful find (and replace) function to find records matching multiple criteria and replace found text with text of your choice. GIS Masher never modifies the original database.

  • Translate from one GIS vector format to another.

  • Open, visualize, and render images of digital elevation models in three different formats. Visualization includes hill shading, texture shading (gray scale), or color relief with or without contours.

  • Combine multiple DEMs into a single DEM, resample DEMs, set the no data value, translate the DEM from feet to meters, etc.

  • Export the DEM in Tif, GridFloat or Img formats, in either a geographic or a spherical mercator project. Export the DEM image as geoTif, png, or jpeg formats.