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All Topics | Topic "Map projections"
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Author Message
David Groves

Subject: Map projections   
Posted: 2/21/2006 Viewed: 23792 times
Map projections David Groves groves <a href="mailto:groves@rand.org">groves@rand.org</a>Hello,

I have an existing WEAP model to which I am trying to add some vector-based maps. The GIS expert that is helping me tells me that the maps I'd like to add use a NAD1927 projection, yet the WEAP "Country Map" on which my model is built uses a WGS1984 projection.

I'm told that to convert to WGS1984, he needs to specify one of 25 different WGS1984 projections. Does anyone know which one is the correct one?

Thank you,

David Groves
Jack Sieber

Subject: Re: Map projections   
Posted: 3/10/2006 Viewed: 23789 times
Re: Map projections Jack Sieber jsieber <a href="mailto:jsieber@tellus.org">jsieber@tellus.org</a>Here is information from the meta data:

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Jack
Topic "Map projections"