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Thread: Command line SW to plot Lambert Azimutal Equalarea projections?

  1. #1
      jumpjack is offline
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    Post Command line SW to plot Lambert Azimutal Equalarea projections?

    I start a different topic besides this one 'cause I hope this one will bring to discover a different SW.

    I found, using Wilbur software, that with LAE projections each area delimited by parallels and meridians maintains its shape (rectangle, triangle, trapeze) when I change the projection center: I guess it means I can use a different center to project each single "tile", so obtaining a 7200 pieces puzzle which can be glued over a sphere...
    Is this correct?

    Does it exist a command line program I can use to bacth project 7200 tiles?

    This method should be better than using "gores", as they don't match correctly, and paper keeps "curling" along the curve...

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      jumpjack is offline
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    Would DGALWARP be suitable?
    http://www.gdal.org/gdalwarp.html
    It relies on PROJ.4, which does support Lambert Azimutal Equal Area... but which is the right command line?

    I can't understand False Easting and False Northing.

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      Redrobes is offline
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    That's a nice little app there I will have to play with that !

    I was going to suggest using a Perl/Python script to do it instead but I guess you would need a lot of ancillary stuff to get the image in and out and the math to do it correctly.

    Sorry I don't know about the params to drive that app though I will have a go and see what I come up with. Might be a while posting back tho - time seems to slip through my fingers of late.

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      Redrobes is offline
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    Just throwing you these two links which might be useful.

    http://trac.osgeo.org/proj/wiki/GenParms -- about half way down.

    http://en.mimi.hu/gis/false_easting.html

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