GRASS

Not much here yet... I finally used GRASS for a project, some notes are here: http://www.wildsong.biz/CDS-Wireless

GRASS 6.0 beta 1 is out now. Everything I write from now on will be based on 6.x

Introduction

Basics

Installing GRASS

GRASS as an alternative to Arc/Info

Converting between different file formats

Case study: Working with a DTM in E00 format

Case study: Preparing Orthophotos as a background layer

GRASS function reference