PywpsTutorials
From PyWPS wiki
Contents |
[edit] Installation
[edit] Installing on Mac OS X
[edit] Kyng Chaos Packages version
Install this packages from Kyng Chaos web site:
- frameworks: All Frameworks
- GRASS: GRASS.app 6.3 CVS 070913 (should work even with other versions)
You natuarlly need Python >= 2.5 to make pyWPS work on Mac.
you can find it at :
Install svn for mac osx :
Subversion osx binaries package
Download pywps source code from svn repository :
svn checkout https://svn.wald.intevation.org/svn/pywps/branches/pywps-2.0
Rename it from "'trunk"' to '"pywps-2.0"' and copy the pywps-2.0 folder to :
/Library/WebServer/CGI-Executables/pywps-2.0/
Make a temporary directory :
mkdir /Library/WebServer/Documents/wps/wpsoutputs/
Give it the right permisions (read and write)
Install pywps into python libraries :
cd /Library/WebServer/CGI-Executables/pywps-2.0 python setup.py install ln -s /usr/bin/wps.py /usr/lib/cgi-bin/wps.py
[edit] configuration
Change the first line of the file :
/Library/WebServer/CGI-Executables/pywps-2.0/wps.py
from : #!/usr/bin/python to : #!/usr/local/bin/python
Setting up the pywps processes files (as example we'll setting up only the addvalue process) :
Rename : /Library/WebServer/CGI-Executables/pywps-2.0/pywps/processes/__init__.py-dist : from : __init__.py-dist to : __init__.py
Rename : /Library/WebServer/CGI-Executables/pywps-2.0/pywps/processes/addvalue.py-dist from : addvalue.py-dist to : addvalue.py
Comment the processeses that you don't need in the file :
/Library/WebServer/CGI-Executables/pywps-2.0/pywps/processes/__init__.py
it must be like :
# Author: Jachym Cepicky # http://les-ejk.cz __all__ = [ "addvalue", # "classify" , # "flow", # "ndvi", # "shortestpath", # "spearpath", # "visibility", # "inputsoutputs", # "buffer", # "convert", ]
Change your /Library/WebServer/CGI-Executables/pywps-2.0/pywps/etc/settings.py file
to reflect your setting :
WPS = {
'version': "0.4.0",
"debuglevel": 0,
'ServiceIdentification': {
'Title':"PyWPS 2.0.0",
'ServiceType':"WPS",
'ServiceTypeVersion':"1.0.0",
},
'ServiceProvider': {
'ProviderName' : "SASHA",
'IndividualName':"EPI",
'PositionName':"UP",
'Role':"UP",
'DeliveryPoint': "Street ",
'City': "City",
'PostalCode':"000000",
'Country': "Your Country",
'ElectronicMailAddress':"massimodisasha@yahoo.it",
},
'OperationsMetadata': {
'ServerAddress' : "http://localhost/cgi-bin/pywps-2.0.0-rc1/wps.py",
},
ServerSettings = {
'outputPath': '/Library/WebServer/Documents/wps/wpsoutputs/',
'outputUrl': 'http://localhost/wps/wpsoutputs',
'tempPath': '/var/tmp',
'maxOperations':1,
'maxSize':5242880, # 5 MB
'maxInputParamLength':1024,
}
Change your /Library/WebServer/CGI-Executables/pywps-2.0/pywps/etc/grass.py file as follow :
grassenv = {
'PATH': "/Applications/GRASS-6.3.app/Contents/MacOS/bin/:/Applications/GRASS-6.3.app/Contents/MacOS/scripts/:/usr/local/bin/:/bin/:",
'GRASS_ADDON_PATH': "",
'GRASS_VERSION': "6.3.cvs",
'GRASS_PERL': "/usr/bin/perl",
'GRASS_GUI': "text",
'GISBASE': "/Applications/GRASS-6.3.app/Contents/MacOS/",
'LD_LIBRARY_PATH':"/Applications/GRASS-6.3.app/Contents/MacOS/lib/",
'HOME':"/Library/WebServer/Documents",
}
Remember to configure you Web server dir.
[edit] test
download a tif file (I've downloaded this) and call from command line:
./wps.py "service=WPS&version=0.4.0&identifier=addvalue&request=execute&datainputs=input,/Volumes/cache/geodata/sample.tif,value,250&status=false&store=true"
/Volumes/cache/geodata/sample.tif is naturally the path to your downloaded file.
the output file opened in QGIS should look like this:
[edit] Compiling GRASS version
If you have a Grass-cvs installed from source, only changes from the previouse notes, are in the file :
/Library/WebServer/CGI-Executables/pywps-2.0/pywps/etc/grass.py
if you have Grass installed in a standard location (/usr/local/grass-6.3.cvs) the settings mus be like :
grassenv = {
'PATH': "/usr/local/grass-6.3.cvs/bin/:/usr/local/grass-6.3.cvs/scripts/:/usr/bin/:/bin/:",
'GRASS_ADDON_PATH': "/Library/GRASS/6.3/Modules/bin/",
'GRASS_VERSION': "6.3.cvs",
'GRASS_PERL': "/usr/bin/perl",
'GRASS_GUI': "text",
'GISBASE': "/usr/local/grass-6.3.cvs",
'LD_LIBRARY_PATH':"/usr/local/grass-6.3.cvs/lib",
'HOME':"/Library/WebServer/Documents",
}
Notes: Thanks to W.K., build grass from source on osx is really simple, just download the cvs files (see here ), and follow the osx notes, you can find it in : /grass6/macosx/ReadMe.rtf in it you have all the info on how to configure and build grass and its dependancies, plus usefool stuff.
