This Webinar, put on by Blue Marble, is an excellent overview of Map Projections. Don't be afraid of its length -- (2:09:53) -- it moves along quickly and is never boring. The question-and-answer part starts at about 1 hour and 20 minutes, so watch it to at least that point.
It's more than that. It'll import just about any format you can think of, and let you convert it into anything else. It can create ridiculously large surfaces, and style them with hill shading, contours, elevation bands, etc. It will display dwg files, survey data, GPS files, you name it.
Please use the Accept as Solution or Kudo buttons when appropriate
My favorite functionality is the ability to project to a different coordinate system with a click of a button. Then, when you export it, it will create a world and projection file for you. For the price you can't beat it.
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Created by the community for the community, Autodesk Exchange Apps for AutoCAD Civil 3D helps you achieve greater speed, accuracy, and automation from concept to manufacturing.