[mapserver-users] Best way to do a batch reprojection (on windows)

Tue Aug 13 03:11:10 PDT 2013

Hi,

I would say that the multi-projection tileindex is the way to go. You can experiment by downloading first Mapserver dev version from http://gisinternals.com/sdk/PackageList.aspx?file=release-1600-gdal-mapserver.zip. Then you can
a) make a backup copy of your  C:\ms4w\Apache\cgi-bin  directory 
b) copy all the dll files from \DGAL_dev\bin into C:\ms4w\Apache\cgi-bin
c) copy mapserv.exe from \GDAL_dev\bin\ms\apps into C:\ms4w\Apache\cgi-bin

Now you *may* have a MS4W version which supports multi-projection tileindexes. For sure this installation is not production safe and Mapserver with mixed binaries may not work at all. Better option would be to contact Gateway Geomatics http://www.gatewaygeomatics.com/ and ask them to make a custom MS4W build for you but then I suppose you must be prepared to use some money for making things happen fast.

-Jukka Rahkonen-

> -----Alkuperäinen viesti-----
> Lähettäjä: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-
> bounces at lists.osgeo.org] Puolesta Evans, James R Civ USAF ACC 84
> RADES/SCZE
> Lähetetty: 13. elokuuta 2013 1:47
> Vastaanottaja: mapserver-users at lists.osgeo.org
> Aihe: Re: [mapserver-users] Best way to do a batch reprojection (on windows)
> 
> Well, the reprojection from NAD83 UTM Zone 16 to WGS84 didn't go so well.
> The edges don't exactly line up so I have a one pixel gap at the upper left hand
> corner, and a big gap at the lower right hand corner.  So, would I have better
> luck reprojecting to some other projection, or should I just leave the data the
> way it is and hope that some future version of Mapserver (MS4W) will support
> multiple projections in the same layer?
> Thanks,
> James
> 
> 
> -----Original Message-----
> From: Evans, James R Civ USAF ACC 84 RADES/SCZE
> Sent: Thursday, August 08, 2013 10:40 AM
> To: mapserver-users at lists.osgeo.org
> Subject: RE: [mapserver-users] Best way to do a batch reprojection (on
> windows)
> 
> I'm using the latest released version of MS4W, not even the latest debug builds,
> so that probably won't work for me.  I'll see what the result is for this first
> conversion.  It would be nice to be able to have one contiguous layer without
> having to do the reprojection.
> Thanks,
> James
> 
> 
> -----Original Message-----
> From: Rahkonen Jukka [mailto:jukka.rahkonen at mmmtike.fi]
> Sent: Wednesday, August 07, 2013 10:38 PM
> To: Evans, James R Civ USAF ACC 84 RADES/SCZE; mapserver-
> users at lists.osgeo.org
> Subject: Re: [mapserver-users] Best way to do a batch reprojection (on
> windows)
> 
> Hi,
> 
> Stop what you do, it is not the right thing anymore. It should not be necessary to
> reproject the images into a common projection any more. This page describes
> how Mapserver is planned to be made to support tileindex with mixed
> projections http://mapserver.org/development/rfc/ms-rfc-100.html and this
> one proves that it has been implemented
> https://github.com/mapserver/mapserver/pull/4697. I am not sure but the
> development builds in http://gisinternals.com/sdk/ may include this new
> feature.
> 
> Before this warping to a common coordinate system has been the way to go
> and gdalwarp is for sure good tool for that. I have using it with average
> resampling for aerial images.  However, there is one nasty problem with warping
> images one by one into a common projection and it is caused by the rotation
> that results from warping. Each rotated image will have nodata collards in the
> corner areas and Mapserver must make them transparent when it is serving the
> final layer. It in simple, but only with uncompressed images because effective
> compression methods are lossy and after compression the nodata areas do not
> have just one pixel value like 0,0,0 but they have also close values like 0,1,0 and
> 0,0,1 etc. and those pixels will not be transparent.
> 
> So I would suggest you to stop what you do and start evaluting tileindex with
> mixed projections. Warping images in-a-fly with Mapserver is fast and you do
> not need to be afraid of that. Your WMS users won't be happy with
> EPSG:4326 or any other single projection for the whole USA anyway so there
> would not be any difference, they will ask reprojected images in any case.
> 
> You can start with the JPEG2000 images as they are but if you want more speed
> later you can convert them without reprojecting inte tiled GeoTIFFs with jpeg
> compression. Nodata problem will not occur in this case because images are not
> rotated.
> 
> -Jukka Rahkonen-
> 
> ________________________________________
> James_in_Utah wrote:
> 
> > Hi,
> > I have the NAIP imagery for CONUS, and it's rather large.  About
> > 4.2TBs,
> of
> JP2 files.  It's projected in 10 UTM zones across the country.  If I'm going to offer
> a single layer with Mapserver, I think I have to reproject all of the files into a
> single projection, say WGS84.  I'm trying to figure out a good way to do that.
> GlobalMapper seems to have this function.  I loaded up all the data from
> Alabama, and told it to convert the projection.  It's been working at it for about
> 8 hours and I see no sign of progress.  I tried creating a batch file to call
> GdalWarp, but for some reason that's getting an error.  Here's the line from my
> batch:
> 
> > for %%f in (*.jp2) do gdalwarp -t_srs EPSG:4326 %%f c:\out\%%f
> 
> > The error is saying 4326 can't be found in the GSC.CSV, even though it
> > is
> plainly in there.  Even if I get this working, this wiill still be very tedious.  The data
> is divide up by states, and under the state directory, there are dozens of
> subdirectories.  I would need some sort of script to walk through the directories.
> 
> > If anyone has a suggestion on how to efficiently reproject this large
> amount
> of data it would be greatly appreciated!
> 
> > Thanks,
> 
> > James
> 
> 
> 
> 
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