Re: [Matplotlib-users] Could basemap plot in a UTM projection? - pyproj documentation
On 4/2/12 9:10 AM, Mathew Topper wrote: Hi, I've been trawling round the internet for a while trying to work out if basemap could be made to plot using a UTM zone projection. I've found some references to pyproj that could be used to convert out of a UTM projection, but I haven't found any references to defining a custom projection for basemap. Is it possible? Also, there is not a lot of documentation regarding pyproj and I find this a little odd considering it comes packaged with basemap. Many Thanks, Mat Mat: Basemap can plot in the tranverse mercator projection (projecton='tmerc') - UTM zones are transverse mercator with specific lat/lon boundaries and a WGS84 ellipsoid. I suppose I could add UTM zone support if there is enough demand for it. -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX: (303)497-6449 NOAA/OAR/PSD R/PSD1Email : jeffrey.s.whita...@noaa.gov 325 BroadwayOffice : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web: http://tinyurl.com/5telg -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Could basemap plot in a UTM projection? - pyproj documentation
On 02/04/12 16:21, Jeff Whitaker wrote: On 4/2/12 9:10 AM, Mathew Topper wrote: Hi, I've been trawling round the internet for a while trying to work out if basemap could be made to plot using a UTM zone projection. I've found some references to pyproj that could be used to convert out of a UTM projection, but I haven't found any references to defining a custom projection for basemap. Is it possible? Also, there is not a lot of documentation regarding pyproj and I find this a little odd considering it comes packaged with basemap. Many Thanks, Mat Mat: Basemap can plot in the tranverse mercator projection (projecton='tmerc') - UTM zones are transverse mercator with specific lat/lon boundaries and a WGS84 ellipsoid. I suppose I could add UTM zone support if there is enough demand for it. -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX: (303)497-6449 NOAA/OAR/PSD R/PSD1Email :jeffrey.s.whita...@noaa.gov 325 BroadwayOffice : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web:http://tinyurl.com/5telg OK, thanks Jeff. So I just need to know the lon/lat bounds of the desired UTM zone and I have effectively created a UTM projection of that zone in basemap i.e. for UTM29 we have 12W to 6W. Will basemap then except coordinates in meters defined by UTM29 or do I have to convert to lon/lat first? I have a bit of an interesting case where the region we are examining lies between UTM29 and UTM30, and I was interested in displaying how the change in projection effects the topography. Thanks Mat -- Dr. Mathew Topper Institute for Energy Systems School of Engineering The University of Edinburgh Faraday Building The King’s Buildings Edinburgh EH9 3JL Tel: +44 (0)131 650 5570 School fax: +44 (0)131 650 6554 mathew.top...@ed.ac.uk mailto:mathew.top...@ed.ac.uk http://www.see.ed.ac.uk http://www.see.ed.ac.uk/ The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Could basemap plot in a UTM projection? - pyproj documentation
On 02/04/12 16:21, Jeff Whitaker wrote: On 4/2/12 9:10 AM, Mathew Topper wrote: Hi, I've been trawling round the internet for a while trying to work out if basemap could be made to plot using a UTM zone projection. I've found some references to pyproj that could be used to convert out of a UTM projection, but I haven't found any references to defining a custom projection for basemap. Is it possible? Also, there is not a lot of documentation regarding pyproj and I find this a little odd considering it comes packaged with basemap. Many Thanks, Mat Mat: Basemap can plot in the tranverse mercator projection (projecton='tmerc') - UTM zones are transverse mercator with specific lat/lon boundaries and a WGS84 ellipsoid. I suppose I could add UTM zone support if there is enough demand for it. -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX: (303)497-6449 NOAA/OAR/PSD R/PSD1Email :jeffrey.s.whita...@noaa.gov 325 BroadwayOffice : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web:http://tinyurl.com/5telg Sorry, somehow the bottom of the last email I sent was in a funny format. Sorry to everyone for spamming this, but just in case it wasn't legible, here it is again OK, thanks Jeff. So I just need to know the lon/lat bounds of the desired UTM zone and I have effectively created a UTM projection of that zone in basemap i.e. for UTM29 we have 12W to 6W. Will basemap then except coordinates in meters defined by UTM29 or do I have to convert to lon/lat first? I have a bit of an interesting case where the region we are examining lies between UTM29 and UTM30, and I was interested in displaying how the change in projection effects the topography. Thanks Mat -- Dr. Mathew Topper Institute for Energy Systems School of Engineering The University of Edinburgh Faraday Building The King’s Buildings Edinburgh EH9 3JL Tel: +44 (0)131 650 5570 School fax: +44 (0)131 650 6554 mathew.top...@ed.ac.uk mailto:mathew.top...@ed.ac.uk http://www.see.ed.ac.uk http://www.see.ed.ac.uk/ The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Could basemap plot in a UTM projection? - pyproj documentation
On 4/2/12 10:03 AM, Mathew Topper wrote: On 02/04/12 16:21, Jeff Whitaker wrote: On 4/2/12 9:10 AM, Mathew Topper wrote: Hi, I've been trawling round the internet for a while trying to work out if basemap could be made to plot using a UTM zone projection. I've found some references to pyproj that could be used to convert out of a UTM projection, but I haven't found any references to defining a custom projection for basemap. Is it possible? Also, there is not a lot of documentation regarding pyproj and I find this a little odd considering it comes packaged with basemap. Many Thanks, Mat Mat: Basemap can plot in the tranverse mercator projection (projecton='tmerc') - UTM zones are transverse mercator with specific lat/lon boundaries and a WGS84 ellipsoid. I suppose I could add UTM zone support if there is enough demand for it. -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX: (303)497-6449 NOAA/OAR/PSD R/PSD1Email :jeffrey.s.whita...@noaa.gov 325 BroadwayOffice : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web:http://tinyurl.com/5telg OK, thanks Jeff. So I just need to know the lon/lat bounds of the desired UTM zone and I have effectively created a UTM projection of that zone in basemap i.e. for UTM29 we have 12W to 6W. Will basemap then except coordinates in meters defined by UTM29 or do I have to convert to lon/lat first? Mat: If you use projection='tmerc' and then give the lat/lon coords of the upper right and lower left corners with llcrnrlon,llcrnrlat,urcrnrlon,urcrnrlat, the projection coordinates will be such that x,y = 0 in the lower left corner. Since those will not match the UTM coordinates exactly, you will have to add an offset in x,y to make them match. -Jeff I have a bit of an interesting case where the region we are examining lies between UTM29 and UTM30, and I was interested in displaying how the change in projection effects the topography. Thanks Mat -- Dr. Mathew Topper Institute for Energy Systems School of Engineering The University of Edinburgh Faraday Building The King's Buildings Edinburgh EH9 3JL Tel: +44 (0)131 650 5570 School fax: +44 (0)131 650 6554 mathew.top...@ed.ac.uk mailto:mathew.top...@ed.ac.uk http://www.see.ed.ac.uk http://www.see.ed.ac.uk/ The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX: (303)497-6449 NOAA/OAR/PSD R/PSD1Email : jeffrey.s.whita...@noaa.gov 325 BroadwayOffice : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web: http://tinyurl.com/5telg -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Could basemap plot in a UTM projection? - pyproj documentation
On 4/2/12 11:23 AM, Jeff Whitaker wrote: On 4/2/12 10:03 AM, Mathew Topper wrote: On 02/04/12 16:21, Jeff Whitaker wrote: On 4/2/12 9:10 AM, Mathew Topper wrote: Hi, I've been trawling round the internet for a while trying to work out if basemap could be made to plot using a UTM zone projection. I've found some references to pyproj that could be used to convert out of a UTM projection, but I haven't found any references to defining a custom projection for basemap. Is it possible? Also, there is not a lot of documentation regarding pyproj and I find this a little odd considering it comes packaged with basemap. Many Thanks, Mat Mat: Basemap can plot in the tranverse mercator projection (projecton='tmerc') - UTM zones are transverse mercator with specific lat/lon boundaries and a WGS84 ellipsoid. I suppose I could add UTM zone support if there is enough demand for it. -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX: (303)497-6449 NOAA/OAR/PSD R/PSD1Email :jeffrey.s.whita...@noaa.gov 325 BroadwayOffice : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web:http://tinyurl.com/5telg OK, thanks Jeff. So I just need to know the lon/lat bounds of the desired UTM zone and I have effectively created a UTM projection of that zone in basemap i.e. for UTM29 we have 12W to 6W. Will basemap then except coordinates in meters defined by UTM29 or do I have to convert to lon/lat first? Mat: If you use projection='tmerc' and then give the lat/lon coords of the upper right and lower left corners with llcrnrlon,llcrnrlat,urcrnrlon,urcrnrlat, the projection coordinates will be such that x,y = 0 in the lower left corner. Since those will not match the UTM coordinates exactly, you will have to add an offset in x,y to make them match. -Jeff Mat: I just updated git master to add the 'k_0' keyword when using projection='tmerc'. This is the scaling factor along the central meridian, and is needed to exactly match the UTM definition. I also added a utmtest.py example, that shows how to plot a UTM zone, and convert Basemap coordinates to UTM coordinates. -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX: (303)497-6449 NOAA/OAR/PSD R/PSD1Email : jeffrey.s.whita...@noaa.gov 325 BroadwayOffice : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web: http://tinyurl.com/5telg -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
