The biggest problem is that the imagery and spot elevations are mostly computer generated, and haven’t had detailed attention from a (human) map maker required to produce a truly fine map. glaciation, ground cover, buildings, roads, etc.), and DEM data. NAD27 vs NAD83Ĭanvec – all-metric maps based on the most recent imagery, terrain features (e.g. There are several problem with these maps: 1) Mapsheets use different contour intervals (older 100 ft and metric 40 m maps are often on neighbouring mapsheets making stitching a nightmare in some areas you get 10-40 m contours at lower elevations and 40-100 m contours at higher elevations on the same mapsheet – yikes!) 2) Mapsheets use different datum, e.g. These maps are typically very well designed and crafted, and for 50k maps they are quite detailed and effective navigation tools. NTS – National Topographic System, an indexing system that organises all of Canada’s maps into an alphanumeric system.Ĭanmatrix – This is the old printed map format used in Canada. This data is collected from aerial photographs (older) and satellite imagery. GPX – GPS data file format containing, among other things, waypoints and tracksĭEM – digital elevation model. Transparency – Transparencies in layers allow you to see layers below. Layers that are above cover layers that are below. Layers – Image and GIS editing programs use layers, similar to the layers of paper on a desk. GeoTIFF or GeoPDF – TIFFs or PDFs that have embedded GIS information GIS – a Geographic Information System is a system designed to capture, store, manipulate, analyze, manage, and present all types of spatial or geographical data. Google Earth Pro: and use GEPFREE as the install key if asked. Have you been using your Smartphone for navigation lately? Wondering if it makes any sense to keep bringing along that old GPS (so say nothing of a map and compass…)? Check out my article on Trip Planning for Garmin GPS units with Google Earth. QGIS – If you want to do more complicated things with a map a full-fledged GIS program allows you to create maps that are fully customized to your needs.Photo Editors - this can be a quick and dirty way of printing print-ready maps available online using software already on your computer.– an easy, inexpensive online way to produce good topo maps on high quality paper. ![]() I’ll go over the first two superficially, reserving most of our time for learning to use Quantum GIS (QGIS). Three techniques for printing your own topo maps will be discussed here.
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