Proj4 - Revision history

Maechlin: /* Online Documentation */

2017-10-09T18:30:29Z

Online Documentation

2017-10-09T18:18:09Z

Example Conversions

2017-10-09T17:50:31Z

Example Conversions

2017-10-09T17:47:48Z

2017-10-09T17:24:36Z

2017-10-09T17:10:10Z

2017-10-09T17:06:16Z

Online Documentation

2017-10-09T06:25:12Z

Building Proj4

2017-10-09T06:24:24Z

FAQ

2017-10-09T06:21:45Z

Online Implementations

@@ Line 106: / Line 106: @@
 *[https://stackoverflow.com/questions/24950614/abnormal-output-when-using-proj4-to-transform-latlong-to-utm C example]
 *[http://commandlinefanatic.com/cgi-bin/showarticle.cgi?article=art026 More C Examples]
 == Downloads and Documentation ==

@@ Line 1: / Line 1: @@
 Coordinate system conversions are needed for several SCEC projects.
-== Example Conversions ==
+== Example Conversion from UTM to X/Y/Z Coordinates ==
 Converting WGS84 to UTM Zone 11 using cs2cs

@@ Line 4: / Line 4: @@
 Converting WGS84 to UTM Zone 11 using cs2cs
-* cs2cs -v +proj=latlong +datum=WGS84 +ellps=WGS84 +to +proj=utm +zone=11 +datum=WGS84 +ellps=WGS84"
+* cs2cs -v +proj=latlong +datum=WGS84 +to +proj=utm +zone=11 +datum=WGS84
 <pre>
 -bash-4.2$ cs2cs -v +proj=latlong +datum=WGS84 +to +proj=utm +zone=11 +datum=WGS84

← Older revision		Revision as of 17:47, 9 October 2017
Line 22:		Line 22:
	== Online Implementation ==		== Online Implementation ==
	*[https://mygeodata.cloud/cs2cs/ CS2CS Online]		*[https://mygeodata.cloud/cs2cs/ CS2CS Online]
		+
		+	== Example Python Code ==
		+
		+	<pre>
		+	-bash-4.2$ more test_pyproj.py
		+	#!/usr/bin/env python
		+	#
		+	# Name: test_pyproj
		+	# Usage:
		+	# Simple example showing how to use pyproj to convert from lat/lon to UTM zone 11
		+	#
		+	import pyproj
		+
		+	#define a projection with Proj4 Notation
		+	latlon_string="+proj=latlong +datum=WGS84 +ellps=WGS84"
		+	utm_string="+proj=utm +zone=11 +datum=WGS84 +ellps=WGS84"
		+
		+	latlon= pyproj.Proj(latlon_string)
		+	utm_s= pyproj.Proj(utm_string)
		+
		+	vals=[-118.0,34.0]
		+	x,y= pyproj.transform(latlon,utm_s,vals[0],vals[1])
		+	print "UTM E: ", x
		+	print "UTM N: ", y
		+	</pre>
		+
		+	== Example C Code and Makefile ==
		+
		+	<pre>
		+	#include <proj_api.h>
		+
		+	main(int argc, char **argv) {
		+	projPJ pj_merc, pj_latlong;
		+	double x, y;
		+	int p;
		+
		+	if (!(pj_merc = pj_init_plus("+proj=merc +ellps=clrk66 +lat_ts=33")) )
		+	exit(1);
		+	if (!(pj_latlong = pj_init_plus("+proj=latlong +ellps=clrk66")) )
		+	exit(1);
		+	while (scanf("%lf %lf", &x, &y) == 2) {
		+	x *= DEG_TO_RAD;
		+	y *= DEG_TO_RAD;
		+	p = pj_transform(pj_latlong, pj_merc, 1, 1, &x, &y, NULL );
		+	printf("%.2f\t%.2f\n", x, y);
		+	}
		+	exit(0);
		+	}
		+	</pre>
		+
		+	<pre>
		+	test_proj4.o: test_proj4.c
		+	gcc -o test_proj4 -lproj -L/home/scec-00/maechlin/workspace/proj4/lib -I/home/scec-00/maechlin/workspace/proj4/include test_
		+	proj4.c
		+	</pre>

@@ Line 46: / Line 46: @@
 *[http://geoinformaticstutorial.blogspot.com/2014/06/converting-coordinates-between-map.html More Python Examples]
 *[https://stackoverflow.com/questions/24950614/abnormal-output-when-using-proj4-to-transform-latlong-to-utm C example]
 == Downloads and Documentation ==

@@ Line 4: / Line 4: @@
 Converting WGS84 to UTM Zone 11 using cs2cs
-* cs2cs -v +proj=latlong +datum=WGS84 +to +proj=utm +zone=11 +datum=WGS84
+* cs2cs -v +proj=latlong +datum=WGS84 +ellps=WGS84 +to +proj=utm +zone=11 +datum=WGS84 +ellps=WGS84"
 <pre>
 -bash-4.2$ cs2cs -v +proj=latlong +datum=WGS84 +to +proj=utm +zone=11 +datum=WGS84
@@ Line 22: / Line 22: @@
 == Online Implementation ==
 *[https://mygeodata.cloud/cs2cs/ CS2CS Online]
 == FAQ ==
@@ Line 38: / Line 39: @@
 == Online Documentation ==
 *[http://hypocenter.usc.edu/research/ucvm/17.3.0/docs/developers_api_data_structures.html UCVM-P Example Strings]
 *[https://en.wikibooks.org/wiki/PROJ.4 Proj4 wikibooks]

@@ Line 41: / Line 41: @@
 *[https://en.wikibooks.org/wiki/PROJ.4 Proj4 wikibooks]
 *[http://www.spatialguru.com/converting-decimal-degree-coordinates/ Defines return paramater elevation]
-*[http://all-geo.org/volcan01010/2012/11/change-coordinates-with-pyproj/ Proj4 Examples]
+*[http://all-geo.org/volcan01010/2012/11/change-coordinates-with-pyproj/ Python Examples]
 *[https://stackoverflow.com/questions/24950614/abnormal-output-when-using-proj4-to-transform-latlong-to-utm C example]

@@ Line 31: / Line 31: @@
 == Building Proj4 ==
-* Proj4 built on Centos using the ./configure make, make install. Since we are building on a shared cluster, we needed to ./configure --install:/user/scec-00/maechlin/workspace/proj4
+* Proj4 built on Centos using the ./configure make, make install. Since we are building on a shared cluster, we needed to ./configure --prefix=/user/scec-00/maechlin/workspace/proj4 (installation path to local directory)
 *Installation of proj4 on Mac (high sierra) failed.
 *Installation of current proj4 on USC HPC succeeded.

@@ Line 25: / Line 25: @@
 == FAQ ==
 *[http://proj.maptools.org/faq.html Online FAQ]
 * What is the +no_defs parameters?
 **"The "no_defs" item ensures that no defaults are read from the defaults files. Sometimes they cause suprising problems." http://lists.osgeo.org/pipermail/mapserver-users/2003-November/046863.html