[Geoserver-users] Help with data translation

GeoServer GeoServer User
1

I have two data sets I am trying to combine the first is North America and the second is some polygons located in Alaska. Here is the data I copied out of Geoserver for each set:

North America:

GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Lon", EAST], AXIS["Lat", NORTH], AUTHORITY["EPSG","4326"]]

Data min X: -178.21420288085938
Data min Y: 7.205832004547119
Data max X: -12.155280113220215
Data max Y: 83.62303161621094

Alaska:

GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Lon", EAST], AXIS["Lat", NORTH], AUTHORITY["EPSG","4326"]]

Data min X: 501342.03124999994
Data min Y: 2532801.9999999995
Data max X: 712566.5625
Data max Y: 2727031.9999999995

How do I determine the different projections used for the data, and how do I transform them to be compatible?

2

Hi Amy,

Are these the shapefiles from GeoServer? Or your own shapefiles? One of the problems with the alaska shapefile is that we don't know its projection... so its not really usable.

Without the projection the only thing we could try to do is to reverse engineer it. Perhaps trying some likely candidates based on the extent values and see how it looks on a map?

Perhaps someone else will have a better answer.

-Justin

Amy Johnson wrote:

I have two data sets I am trying to combine the first is North America and the second is some polygons located in Alaska. Here is the data I copied out of Geoserver for each set:

North America:

GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Lon", EAST], AXIS["Lat", NORTH], AUTHORITY["EPSG","4326"]]

Data min X: -178.21420288085938
Data min Y: 7.205832004547119
Data max X: -12.155280113220215
Data max Y: 83.62303161621094

Alaska:

GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Lon", EAST], AXIS["Lat", NORTH], AUTHORITY["EPSG","4326"]]

Data min X: 501342.03124999994
Data min Y: 2532801.9999999995
Data max X: 712566.5625
Data max Y: 2727031.9999999995

How do I determine the different projections used for the data, and how do I transform them to be compatible?

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Justin Deoliveira
The Open Planning Project
http://topp.openplans.org