The Atlas will comprise a dynamic list of data inputs for Yukon regional land use planning. Data is continually being sought out and contributed to the planning efforts, and will vary from region to region as values, priorities and opportunities emerge from consultations. The schema follows conventions from the CSW, although that too is dynamic. Existing GeoBase? layers, esp. the 1:1M and 1:250K also need to be identified and evaluated. The schema is not intended to be implemented in a database structure, but may provide the basis for thematic grouping. As definitive sources (local shape, postGIS, WMS, SDE?) for each layer are confirmed, they may be added to the Atlas.

This  data schema is a work in progress.

• The spreadsheet lists THEMES/GROUPS/LAYERS
• Highlighted layers have no identified WMS source yet
  • from !JeffH: "Shouldn't be a big stretch from here to a layer manager/legend"

Some data management principles have been identified through a review of the schema.

%BLUE%JH: Here are URLS for data 'from source' for several base layers in the Atlas: Base Layers:

•  Yukon Border - 100k (GeoBase? layer)
•  National Road Network(GeoBase? layer)
• [: ftp://atlas.planyukon.ca/outgoing/NYPC/Biophysical/feb_2006:Biophysical Map] (login = atlas/planyukon)
• [: ftp://atlas.planyukon.ca/outgoing/YLUPC/Plan_Regions_Yukon:Yukon Planning Regions] (login = atlas/planyukon)

• The Yukon Albers projection parameters should be the default projection:

Yukon Albers Projection Parameters:

• Projection: Albers Equal Area Conic
• Datum: NAD83
• Spheroid: GRS80
• Central Meridian: 132°30’00" W (-132.5 in decimal degrees)
• Projection Origin: 59°00’00" N
• 1st Standard Parallel: 61°40’00" N (61.6666667 in decimal degrees)
• 2nd Standard Parallel: 68°00’00" N
• False Easting: 500,000 m
• False Northing: 500,000 m

In Mapserver format, the proj [parameters are:

# Projection parameters representing the Yukon Albers projection.

PROJECTION

"proj=aea"

"ellps=GRS80"

"lat_0=59"

"lon_0=-132.5"

"lat_1=61.667"

"lat_2=68"

"x_0=500000.0"

"y_0=500000.0"

"units=m"

"no_defs"

END