Difference between revisions of "Proj4"
From SCECpedia
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*[https://en.wikibooks.org/wiki/PROJ.4 Proj4 wikibooks] | *[https://en.wikibooks.org/wiki/PROJ.4 Proj4 wikibooks] | ||
*[http://www.spatialguru.com/converting-decimal-degree-coordinates/ Defines return paramater elevation] | *[http://www.spatialguru.com/converting-decimal-degree-coordinates/ Defines return paramater elevation] | ||
| − | *[http://all-geo.org/volcan01010/2012/11/change-coordinates-with-pyproj/ | + | *[http://all-geo.org/volcan01010/2012/11/change-coordinates-with-pyproj/ Python Examples] |
| + | *[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] | *[https://stackoverflow.com/questions/24950614/abnormal-output-when-using-proj4-to-transform-latlong-to-utm C example] | ||
Revision as of 17:06, 9 October 2017
Coordinate system conversions are needed for several SCEC projects.
Contents
Example Conversions
Converting WGS84 to UTM Zone 11 using cs2cs
- cs2cs -v +proj=latlong +datum=WGS84 +to +proj=utm +zone=11 +datum=WGS84
-bash-4.2$ cs2cs -v +proj=latlong +datum=WGS84 +to +proj=utm +zone=11 +datum=WGS84 # ---- From Coordinate System ---- #Lat/long (Geodetic alias) # # +proj=latlong +datum=WGS84 +ellps=WGS84 +towgs84=0,0,0 # ---- To Coordinate System ---- #Universal Transverse Mercator (UTM) # Cyl, Sph # zone= south # +proj=utm +zone=11 +datum=WGS84 +ellps=WGS84 +towgs84=0,0,0 -118.00 34.00 407650.40 3762606.66 0.00
Online Implementation
FAQ
- Online FAQ
- what is the third return parameter in UTM values
- input lat/long can include elevation. Third returned UTM param is elevation. When no lat/lon elevation used, utm return elev is 0.0
- 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
Building 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.
- Didn't try installing pyproj on Mac. It can use either installed proj4, or try to build its own
- Used conda install pyproj on Anaconda 2 instance on USC HPC
Online Documentation
- UCVM-P Example Strings
- Proj4 wikibooks
- Defines return paramater elevation
- Python Examples
- More Python Examples
- C example
