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By re-processing exsting, public-domain data, I produced a series of "VNC-like" 1:250K topos for the civilian air search-and-rescue group in Smithers, BC, (CASARA) to use as navigation maps. These combine the NTS 1:250K topographic base with the shaded relief and hypsometric tinting found on the 1:500K Visual Navigation Charts used by pilots. |
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This is a detail of a trails map for the Community Forest just outside Smithers, British Columbia. These trails interconnect at several points with the Northeast Slope Trails (see below). Labels indicate letter signs posted at trail intersections |
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This is a detail of a trails map of the northeast slope of Hudson Bay Mountain, at the edge of town in Smithers, British Columbia. The bottom layer in this map is a 1 metre orthophoto mosaic produced for the BC Forest Service. The chief challenge in the map was selecting colours that would show up well against this background of various values and hues. |
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This image shows Hudson Bay Mountain, in British Columbia, and the valley on its southeast side. I created this 3D scene using 3DEM, one of the best pieces of presentation software for digital elevation models (DEMs). The DEM data was from CDED (Canadian Digital Elevation Data) available free from geobase.ca, and the orthorectified satellite image came from toporama.ca. |
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These bathymetry contours, overlaid on a shaded image of a lake bottom, were generated from a set of spot depths. I used GRASS to interpolate a surface from the spot depths, and then to generate contours from that surface. I produced the background image using 3DEM, and displayed the contours over it using dlgv32pro. For a lake outline I used Lake Kathlyn, British Columbia. The spot depths were fictitious. |
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The image at left shows a portion of Hudson Bay Mountain, British Columbia. I made it with the Autodesk MapGuide browser plug-in, which is essentially just a viewer for on-line data. In this case the data is from the British Columbia Ministry of Energy and Mines online multi-layer geographic database. The data displayed here is from their on-line BCGS Geology Map. |
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The image at right shows a portion of the Northwest Territories—a small slice of NTS Quad 76D. The 3D view was generated by MicroDEM, a piece of software that is specifically geared to displaying digital elevation model data. The DEM data came from CDED at geobase.ca, and the topographic raster overlay came from toporama.ca. |
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The image at left shows the Pacific Northwest Coast "turned on its head," so that it appears to run parallel to the top of the mapsheet I made this map with gmt (the generic mapping tools), an open-source mapping package whose pscoast application is particularly well suited to displaying coastlines, and offers a huge number of projections. I used the high resolution coastline database that comes with gmt. |
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The image at right shows the Queen Charlotte Islands and the adjacent coast of British Columbia. It was done with MapInfo. Like ESRI's ArcView, MapInfo is geared to displaying geographic features that are associated with tables of data. The data here are the drainages layers (15, 16 & 17) of the BC portion of the National Atlas of Canada, 1:2,000,000, from geogratis.ca. |
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This is an image of the Tien Shan Mountains in Kyrgyzstan, Central Asia. I used GeoExpresss View to extract this small image from a MrSID file. GeoExpress View is the free MrSID viewer from Lizard Tech, and has elegant tools I have seen for zooming and panning in MrSID images. It also allows you to save any subportion of the image as a GeoTiff file. The data is from NASA's Geo Cover product, downloaded from the NASA Earth Science Applications Directorate. |
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This is a 3D rendering of part of the Ark Mountain 1:50,000 quadrangle, Yukon Territory, Canada. I created it by taking vector hypsography data and converting into a digital elevation model using GRASS. GRASS's command-line interface makes it easy to chain together multiple commands into a tool you've never seen before. The data came from Canada's National Topographic Database product, from the Centre for Topographic Information, Sherbrooke. |
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For GIS services, please contact Morgan at mjh[at]hesperus-wild.org.
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