OpenOrienteering Mapper is a free and open source map making software for Windows. Using this software, you can create new maps and save them on your PC. Moreover, you can also edit the existing maps by importing them. You can import a map in the following formats: OMAP, XMAP, OCD, SHP, SHX, GPX, etc.
You can create custom map with the help of symbols available in the symbol sets. Multiple symbol sets are provided in the software. You have to select which symbol set you want to use in your project before creating a new one. A large number of symbols are provided in these symbol sets by which you can make more detailed maps. Some of these symbols are open sandy ground, bare rock, lake, pond, water hole, open land with scattered trees, rough opened land, rough opened land with scattered trees, forest, vegetation, cultivated land, contour, form line, impassable cliff, rock pillars, etc.
It has a measurement tool, by which you can measure the boundary length and area of a particular region. But, the boundary length and area are correct in case only if there are no self-intersections and holes in the region thus measured.
After creating a map, you can save it in OMAP, XMAP, and OCD formats. You can also export the map in PNG, BMP, JPG, TIFF, and PDF formats.