Transcript GEOG200
Geography of BC: BC landscapes from maps and images Roger Wheate: Matterhorn, Swiss Alps [email protected] Mt. Assiniboine, southern BC Mt. Ida, northern BC BC: Canada’s most mountainous province ….. and the furthest away from Ottawa Mapping resources > analogue maps > digital maps > air photos > satellite images > map websites BC – major roads 500 km 500 km BC historical maps – UNBC library has some, others at: http://www.bcarchives.gov.bc.ca/cartogr/general/maps.htm http://www.davidrumsey.com/luna/servlet/view/search?q=British+Columbia&sort=Pub_Date,Pub_List_No,Series_No Canada is divided into 1:1,000,000 sheets, numbered 1-117, 8 ° longitude x 4 ° longitude 1964 MAPS 1:1,000,000 scale corresponds to … 1cm = 1,000,000 cm = 10,000m = 10km 1:1,000,000 maps are divided into (16) 1:250,000 sheets (2 x 1 degree), completed 1970 1:250,000 corresponds to 1 cm = 2.5 km Kechika (northern BC) 1st edition mapped 1949 Postwar Aerial photography + ground survey UTM grid squares every 10km on a printed 1:250,000 map sheet then into 16 x 1:50,000 (A-P), completed for provinces ~1990 1:50,000 corresponds to 1cm = 0.5 km Prince George: 93G15 1980 2000 Topographic maps – where to get them in PG 1. UNBC map library – complete BC collection at 1:50,000 / 1:250,000 2. Buy your own : http://maps.nrcan.gc.ca/ 3. Download a pdf or tiff scanned version: http://geogratis.ca 4. View online – Atlas of Canada: http://atlas.nrcan.gc.ca/site/english/index.html 5. BC provincial 1:20,000: http://www.canadamapstore.com/ Zoom online to 1:50,000 map detail http://atlas.nrcan.gc.ca/site/english/index.html NTS map index by province NTS sheet listings The National Topographic DataBase (NTDB) is the digital equivalent of the printed maps 3D topo maps: http://www.earthdetails.com/ Wells- Barkerville 1944 1957 Aerial photos showing urban change in Prince George Use of historical air photos to map physical change Retreat of Castle Glacier Little Ice Age (LIA) ~1850 to 2004 Landsat satellite image, 2010 Castle Glacier, near McBride Bowron Lakes – Landsat Thematic Mapper (basis of Google Earth) …. free to download since 2009 BC online provincial mapping: http://www.lrdw.ca/ Municipal mapping: http://pgmap.princegeorge.ca/ Saanich Online Mapping System http://www.gov.saanich.bc.ca/resident/gis/index.html Columbia Basin Trust: http://www.sgrc.selkirk.ca/imf5_2/sites/cbt/jsp/launch.jsp Other BC cities: see links to other maps: http://www.mapplace.ca/ Exploring BC with Google maps: http://maps.google.ca Exploring BC using Google Earth Printed maps have some advantages – larger display, no equipment needed, finer details etc.. Advantages of digital mapping: Seamless (no map edges) Variable scale (zoom and pan) Whole province / world available onscreen (free) Easier to update (imagery) Integrated with associated technologies e.g. 3D Seeing BC one small piece at a time …. and blowing it up http://chaosinyourtown.com/