Template:BC Basemap: Difference between revisions

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imported>ScottN
now uses cosine function
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*1 degree lattitude = 60 nautical miles = 111.12km
*1 degree lattitude = 60 nautical miles = 111.12km
*1 degree longitude = 111.12km * cos (lattitude)
*1 degree longitude = 111.12km * cos (lattitude)
*0.6427 = cosine (50).  This is required to adjust the longitude scale since the real world distance for one degree of longitude is proportional to the cosine of the lattitude.  Ideally this would be a call to a cosine function but I don't think the wiki can do that so I've pre-programmed it to 50 degrees lattitude for now.


test calculations:
test calculations:

Revision as of 08:24, 27 February 2008

Expression error: Unrecognized punctuation character "{".&HEIGHT=2222.4&LAYERS=TRIM_EBM_OCEAN,TRIM_EBM_WATERBODIES,TRIM_EBM_WATERCOURSES,TRIM_EBM_WETLANDS,TWTR_LINES,TTRN_LINES,TCVR_LINES,TCVR_POINTS,TCTR_LINES,TTRN_POINTS,TSRF_POINTS,TCTR_POINTS,WHSE_BASEMAPPING.TRIM_TEXT_ANNO,TWTR_ANNO,TTRN_ANNO,TSRF_ANNO,TCVR_ANNO,TCUL_ANNO,TCTR_ANNO,BCGS_GRIDNTS_BC_COASTLINE_POLYS_125M,NTS_BC_RIV_LAKE_WET_POLYS_125M,NTS_BC_COASTLINE_LINES_125M,NTS_BC_CONTOUR_LINES_125M,NTS_BC_MANMADE_LINES_125M,NTS_BC_TRANSPORT_LINES_125M,NTS_BC_TRANSPORT_POINTS_125M,NTS_BC_WATER_POINTS_125M,NTS_BC_LANDFORM_POINTS_125M,NTS_BC_ANNO,NTS_GRID,BC_RIV_LAKE_WET_POLYS_500M,BC_WATER_LINES_500M,BC_TRANSPORT_LINES_500M,BC_PROV_BOUNDARIES_LINES_500M,BC_MANMADE_LINES_500M,BC_MAJOR_CITIES_POINTS_500M,BC_WATER_POINTS_500M,BC_TRANSPORT_POINTS_500M,BC_SPOT_ELEVATION_POINTS_500M,BC_MANMADE_POINTS_500M,BC_WATER_POLYS_5KM,BC_BASEMAP_LINES_5KM_water,BC_BASEMAP_LINES_5KM_transport,BC_BASEMAP_LINES_5KM_boundary,DBM_7H_MIL_POPULATION_POINT,DBM_7H_MIL_BOUNDARIES_LINE,DBM_7H_MIL_DRAINAGE_LINE,DBM_7H_MIL_DRAINAGE_POLY,DBM_7H_MIL_ROADS_LINE,DBM_7H_MIL_PARK_POLY,DBM_7H_MIL_POLITICAL_POLY_PS,DBM_7H_MIL_POLITICAL_POLY_BC,DBM_7H_MIL_BATHYMETRIC_POLY,&STYLES=&FORMAT=PNG BC Basemap

Parameters:

There are 2 options to specify the bounding box. Either use lat, long, width and height or use north, south, east and west.

  • lat: lattitude of the center of the map (default:50.00)
  • long: longitude of the center of the map (default:123.00}
  • height: height of the map in km (default:10km)
  • width: width of the map in km (default:10km)
  • scale: map scale in pixels / km (default:100 pixels/km)
  • link: text to appear in the link
  • north: lattitude of top of bounding box
  • south: lattitude of bottom of bounding box
  • east: lattitude of right side of bounding box
  • west: lattitude of left side of bounding box

calculation notes

  • 1 nautical mile = 1.85200km
  • 1 degree lattitude = 60 nautical miles = 111.12km
  • 1 degree longitude = 111.12km * cos (lattitude)

test calculations:

  • 50.044996400288
  • 49.955003599712
  • -Expression error: Unrecognized punctuation character "{".
  • -Expression error: Unrecognized punctuation character "{".
  • 1000
  • 1000
  • 2222.4
  • Expression error: Unrecognized punctuation character "{".
  • {{#const:pi}}
  • {{#cos: (50*{{#const:pi}}/180)}}


Known Layers

This reference has some information on the available layers, but they are not 100% accurate.

Layer Name Contents Notes
T_MSIC_ANNO Unknown Thought to contain air photo annotations, but removing this layer did not remove the air photo annotations
TCVR_LINES Land Cover Lines Green lines that show treeline boundary
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