I have it functioning now, but the input and output values are the same, I'm not seeing any conversion.
________________________________ From: Milo van der Linden [mailto:[email protected]] Sent: Thursday, January 13, 2011 11:09 AM To: Bistrais, Bob Cc: mapserver-users Subject: Re: [mapserver-users] Reporting lat/long from projected map units Mmm, that shouldn't be to hard. Let me try; var source = new Proj4js.Proj('EPSG:YOUR_UTM_EPSGCODE'); var dest = new Proj4js.Proj('EPSG:4326'); . . . // transforming point coordinates var p = new Proj4js.Point(YOUR_UTM_X,YOUR_UTM_Y); Proj4js.transform(source, dest, p); alert(p.x); //WILL ALERT YOUR NEW LON alert(p.y); //WILL ALERT YOUR NEW LAT 2011/1/13 Bistrais, Bob <[email protected]> I downloaded the code and am looking at the Wiki. I don't see anything to input screen or UTM coords. Is it in the code somewhere? ________________________________ From: Milo van der Linden [mailto:[email protected]] Sent: Wednesday, January 12, 2011 12:44 PM To: mapserver-users Subject: Re: [mapserver-users] Reporting lat/long from projected map units (Sorry, my last posts went straight to you by accident, I prefer to stay on the list, but gmail for applications not always agrees with me) proj4js has project pages including documentation on the OSGeo wiki. The userguide is here: http://trac.osgeo.org/proj4js/wiki/UserGuide and it immediately explains what you want 2011/1/12 Bistrais, Bob <[email protected]> Yes, I can get UTM coordinates back. Can you elaborate a bit on proj4js? I'm not familiar with that. ________________________________ From: Milo van der Linden [mailto:[email protected]] Sent: Wednesday, January 12, 2011 11:10 AM To: Bistrais, Bob Subject: Re: [mapserver-users] Reporting lat/long from projected map units Well then one question remains: Are you able to convert screen coords to UTM capturing an onclick event? Because then all you need to do is enhance it with proj4js 2011/1/12 Bistrais, Bob <[email protected]> Yes, a web mapping application. Not using Open Layers. We are using PHP-Mapscript/HTML/JavaScript. All queryable data is in shapefiles, again, all of these are in UTM. ________________________________ From: Milo van der Linden [mailto:[email protected]] Sent: Wednesday, January 12, 2011 11:03 AM To: Bistrais, Bob Subject: Re: [mapserver-users] Reporting lat/long from projected map units Are you talking bout a web-app? Do you use a client like OpenLayers? What programming language(s) do you use? Is your datasource a database? Like postgis? If you can get UTM coordinates from the mouseclick, the next best option (in my opinion) would be to use proj4js: http://proj4js.org/ Simply embed the js-library ad an event for mouse handling and convert: screen->utm->4326. 2011/1/12 Bistrais, Bob <[email protected]> This should be fairly straightforward, but I was wondering what is the easiest and quickest way to convert coordinates on the fly. All my data is in UTM coordinates. I want to report coordinates to the screen in Lat/Long. Changing the projections on the map files to lat/long (EPSG:4326) is not an option, as this will cause problems elsewhere. So what I want to do is take point coordinates, either from a mouse click or from UTM coordinates, project to lat/long, which will be reported in a result window. What is the quickest way to do this? _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
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