Converting a "world projection E and N value to lat/lon
Brian Harvey
Global Mapper UserTrusted User
A client has sent me a csv.file that has some 200 points in it, in columns, Point Name, Easting , Northing.
However the values for Easting are 328172717 and N, 1372384048. These bear no relation to our Aussie UTM Zone 56 H. I am wondering if they have been created in CAD programme, and it has assumed some local start point.
Is there such a thing as a world file that covers the globe ?
Thanks
Brian
However the values for Easting are 328172717 and N, 1372384048. These bear no relation to our Aussie UTM Zone 56 H. I am wondering if they have been created in CAD programme, and it has assumed some local start point.
Is there such a thing as a world file that covers the globe ?
Thanks
Brian
Comments
-
Hi Brian,
Did you get a world file with the .csv? The most common world file type is associated with raster data, but I believe there is another type that provides an affine reference to show the CAD file in Arc. However, with a .csv, you should not need a world file to import it into Global Mapper...I would confirm the native coordinate system with your client.
Regards,
Jasmine -
Brian,
Looking at the coordinates I wonder if they are stored in whole millimeters or centimeters rather than decimal meters? If you divide the values by 100 or 1000 do they look more like the expected UTM values? If so you can specify a Point Offset/Scale on import to scale the X and Y or just set up the projection to be based on centimeters or millimeters.
Thanks,
Mike
Global Mapper Guru
geohelp@bluemarblegeo.com
Blue Marble Geographics for Coordinate Conversion, Image Reprojection and Vector Translation -
Thanks for your responses.
Categories
- 12.7K All Categories
- 5.6K Features Discussion
- 342 Downloading Imagery
- 1.3K Elevation Data
- 380 Georeferencing Imagery Discussion
- 628 GM Script Language
- 53 User Scripts
- 113 GPS Features
- 414 Projection Questions
- 819 Raster Data
- 1.3K Vector Data
- 6.6K Support
- 177 Announcement and News
- 908 Bug Report
- 558 SDK
- 1.2K Suggestion Box
- 3.7K Technical Support
- 562 Other Discussion
- 129 GIS Data Sources
- 27 Global Mapper Showcase
- 233 How I use Global Mapper
- 107 Global Mapper Forum Website