Here are explanations for the projection of the element
occurrence spatial files available for download, and information
about the coordinate location within data request responses and
shapefiles. Please note these shapefiles and coordinate information
should be used by those experienced with spatial information
knowledge and any questions to ACIMS will be referred back to this
FAQ.
Projection Information for Element Occurrence
Shapefiles:
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General Name: 10TM NAD83
Datum: NAD 1983
Spheroid: GRS 1980
Prime Meridian: 0.0
Unit: Degree
Projection: Transverse Mercator
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False Easting: 500000.0
False Northing: 0.0
Central Meridian: 115
Scale Factor: 0.9992
Latitude of Origin: 0.0
Unit: Meter
|
Spatial Coordinate Information:
Coordinate points: The coordinates refer to the
'centroid' of the element occurrence - if it's a circular polygon,
this is the logical centre. If its an irregular shape (like a
crescent moon, or multiple polygons) the 'centroid' may not be the
most visually logical, or actually sit outside the polygon - it is
correct however based on the mathematic calculations used to define
a 'centroid' of an object. The coordinates provided are for
general reference only and should be used with caution.
EAST_10TM: The 10 TM (10 degree Transverse Mercator)
Easting coordinate of the centre of the element occurrence.
NORTH_10TM: The 10 TM (10 degree Transverse Mercator)
Northing coordinate of the centre of the element occurrence.
LAT: The measure of 'Latitude' of the centre of the
element occurrence, in Degrees, Minutes, Seconds.
LONG: The measure of 'Longitude' of the centre of the
element occurrence, in Degrees, Minutes, Seconds.
UTM_ZONE: The Universal Transverse Mercator Zone in
which the majority of the element occurrence falls within. Alberta
is covered by Zone 11 (114 - 120 degrees longitude) and Zone 12
(110-114 degrees longitude).
EAST_UTM: The Universal Transverse Mercator Easting
coordinate of the centre of the element occurrence.
NORTH_UTM: The Universal Transverse Mercator Northing
coordinate of the centre of the element occurrence.