[Xastir] Format for .geo files

[RileyC]

Thanks!   I'll check those things!

Riley

On Wed, Apr 20, 2022, 12:02 Tom Russo <russo at bogodyn.org> wrote:

> On Wed, Apr 20, 2022 at 11:55:27AM -0400, we recorded a bogon-computron
> collision of the <rufus.rizzo78 at gmail.com> flavor, containing:
> > Thanks!  Yes I've done that and converted a few.  When I point Xastir to
> my
> > Offline directory with the converted files, there are no maps.
> >
> > The documentation reads like I need a type of index file.  I got the USGS
> > csv indexes that match coordinates to the image files.  I'm looking for
> the
> > needed formatting for that index file.  That's what I'm naively calling a
> > .geo file.
>
> No, there should be no need for an additional index file.
>
> I have a whole directory of converted GeoPDFs in GeoTIFF format that work
> exactly as well as the old USGS geotiff files that geopdf2gtiff.pl is
> meant
> to emulate.
>
> Is your Offline directory reindexed?  Does Xastir display an error messages
> on the console?  Did you convert with geopdf2gtiff.pl?
>
> And do you in fact have Xastir built to support geotiff files?
>
> If you run "gdalinfo" on one of your converted files, what do you see?  It
> should information about how the converted file is using WGS84 geographic
> coordinates, and other information like the fact that it's using a color
> table and not RGB.  For example:
>
> Driver: GTiff/GeoTIFF
> Files: NM_Escabosa_20110301_TM_geo.tif
> Size is 3140, 3140
> Coordinate System is:
> GEOGCRS["WGS 84",
>     DATUM["World Geodetic System 1984",
>         ELLIPSOID["WGS 84",6378137,298.257223563,
>             LENGTHUNIT["metre",1]]],
>     PRIMEM["Greenwich",0,
>         ANGLEUNIT["degree",0.0174532925199433]],
>     CS[ellipsoidal,2],
>         AXIS["geodetic latitude (Lat)",north,
>             ORDER[1],
>             ANGLEUNIT["degree",0.0174532925199433]],
>         AXIS["geodetic longitude (Lon)",east,
>             ORDER[2],
>             ANGLEUNIT["degree",0.0174532925199433]],
>     ID["EPSG",4326]]
> Data axis to CRS axis mapping: 2,1
> Origin = (-106.375000000000000,34.999999999999993)
> Pixel Size = (0.000039808917197,-0.000039808917197)
> Metadata:
>   AREA_OR_POINT=Area
> Image Structure Metadata:
>   INTERLEAVE=BAND
> Corner Coordinates:
> Upper Left  (-106.3750000,  35.0000000) (106d22'30.00"W, 35d 0' 0.00"N)
> Lower Left  (-106.3750000,  34.8750000) (106d22'30.00"W, 34d52'30.00"N)
> Upper Right (-106.2500000,  35.0000000) (106d15' 0.00"W, 35d 0' 0.00"N)
> Lower Right (-106.2500000,  34.8750000) (106d15' 0.00"W, 34d52'30.00"N)
> Center      (-106.3125000,  34.9375000) (106d18'45.00"W, 34d56'15.00"N)
> Band 1 Block=3140x2 Type=Byte, ColorInterp=Palette
>   Color Table (RGB with 256 entries)
>     0: 112,120,120,255
> [...]
>
>
> All that information in the geotiff is all that is needed to get Xastir to
> display it properly.
>
>
>
> > On Wed, Apr 20, 2022, 11:10 Tom Russo <russo at bogodyn.org> wrote:
> >
> > > ".geo" files are not for referencing geopdfs, they're for
> georeferencing
> > > images in PNG or JPG format (like a scanned image or something).
> > >
> > > Geopdfs are newer than any map type coded into Xastir, and there is no
> > > native support for them at all.
> > >
> > > You can, however, convert geopdfs to GeoTIFF format, and they'll work
> just
> > > fine.
> > > Since they have georeferencing information in the file already, you
> need no
> > > other additional files to do this.
> > >
> > > However, you do have to convert the file using a script called "
> > > geopdf2gtiff.pl"
> > > in the Xastir "scripts" directory, and this script requires that you
> have
> > > GDAL installed (it uses gdalinfo, gdalwarp, and the "rgb2pct.py" script
> > > provided by GDAL).
> > >
> > >
> > > On Wed, Apr 20, 2022 at 10:40:00AM -0400, we recorded a bogon-computron
> > > collision of the <rufus.rizzo78 at gmail.com> flavor, containing:
> > > > I'm working on getting USGS offline maps, and I'm having problems
> > > bringing
> > > > them up in Xastir.  Is there a format documented for the indexing of
> the
> > > > maps?
> > > >
> > > > The link in the documentation is broken:
> > > > http://data.geocomm.com/quadindex/
> > > >
> > > > I've got the USGS index files that point to the Geopdfs, and can
> convert
> > > > them so they will work like the link mentions, but I'm unsure how to
> > > format
> > > > them.
> > > >
> > > > If I can get it working I can share my script.
> > > >
> > > > Thanks!
> > > >
> > > > Riley
> > > > Kf4emz
> > > > _______________________________________________
> > > > Xastir mailing list
> > > > Xastir at lists.xastir.org
> > > > http://xastir.org/mailman/listinfo/xastir
> > >
> > > --
> > > Tom Russo    KM5VY
> > > Tijeras, NM
> > >
> > >  echo "prpv_a'rfg_cnf_har_cvcr" | sed -e 's/_/ /g' | tr [a-m][n-z]
> > > [n-z][a-m]
> > >
> > > _______________________________________________
> > > Xastir mailing list
> > > Xastir at lists.xastir.org
> > > http://xastir.org/mailman/listinfo/xastir
> > >
>
> --
> Tom Russo    KM5VY
> Tijeras, NM
>
>  echo "prpv_a'rfg_cnf_har_cvcr" | sed -e 's/_/ /g' | tr [a-m][n-z]
> [n-z][a-m]
>
>