[mapserver-users] kml superoverlays
Jeff McKenna
jmckenna at gatewaygeomatics.com
Thu Jan 14 12:22:51 PST 2016
On 2016-01-13 1:20 PM, Even Rouault wrote:
> Le mercredi 13 janvier 2016 17:59:46, Páll Péter Hunor a écrit :
>> Hi,
>>
>> Thanks for tip, I already have seen that option, but I have not found
>> any example how to use it.
>> Does anybody have any experience with that?
>
> You can refer to general raster input documentation :
> http://mapserver.org/input/raster.html
>
> Check first with gdalinfo that the KML superoverlay is properly recognized. If
> that works, you should also be able to open it in a desktop GIS such as QGIS.
>
>>
>> Hunor
>>
>> On 2016.01.13. 17:32, Even Rouault wrote:
>>> Le mercredi 13 janvier 2016 17:15:12, Páll Péter Hunor a écrit :
>>>> Hi,
>>>>
>>>> Does mapserver support raster layers using kml superoverlays as data
>>>> source, similar to shapefile based tileindexes?
>>>> I did not find any solution, but I still might exist...
>>>> Thanks in advance.
>>>
>>> GDAL supports opening kml superoverlays file as rasters (probably with
>>> some caveats), so you can try adding DATA your.kml or your.kmz in the
>>> mapfile.
>>>
>>> (no docs apart mentionning it in
>>> http://gdal.org/formats_list.html )
>>>
>>>> Regards,
>>>> Hunor
>
This caught my interest yesterday, so I did some testing locally with a
KML superoverlay. I used the file referenced in the KML reference doc:
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml
What I found was that I have troubles getting GDAL to read this file on
Windows, yet no problems with Ubuntu.
I compile GDAL from source for both Windows and Ubuntu. To be honest, at
first I thought the issue must be because on Windows I was using GDAL
2.0.1, and on Ubuntu I am using GDAL-trunk; but today I did a fresh
build of GDAL-trunk on Windows, and the same problem exists. I'm sharing
this because I am stuck on why this occurs. Here is more details:
Test 1: VSICURL to a remote GeoTIFF, on Windows
===============================================
gdalinfo
/vsicurl/http://svn.osgeo.org/gdal/trunk/autotest/utilties/data/pyramid_shaded_ref.tif
result: expected details on the tif extents etc.
Test 2: VSICURL to the remote KML Superoverlay, on Windows
==========================================================
gdalinfo
/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml
gdalinfo failed - unable to open
'/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml'.
Test 3: VSICURL to the remote KML Superoverlay, on Windows, with debug
======================================================================
gdalinfo --config CPL_DEBUG ON
/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml)=0
r
esponse_code=200
VSICURL:
GetFileList(/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-samples)
VSICURL: Downloading 0-18446744073709551615
(http://mw1.google.com/mw-earth-vectordb/kml-s
amples/mv-doqq.kml)...
VSICURL: Got response_code=206
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.hdr)=0
r
esponse_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.HDR)=0
r
esponse_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml.hdr)=
0 response_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml.HDR)=
0 response_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/MV-DOQQ.HDR)=0
r
esponse_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.aux)=0
r
esponse_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.AUX)=0
r
esponse_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml.xml)=
0 response_code=404
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/
1.kml
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/1
.kml
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501\
1.JPEG
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501\1
.JPEG
OGRDB2DriverOpen: pszFilename:
'/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-sampl
es/mv-doqq.kml'
gdalinfo failed - unable to open
'/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-sam
ples/mv-doqq.kml'.
Test 4: VSICURL to the remote KML Superoverlay, on Ubuntu, with debug
=====================================================================
$ gdalinfo --config CPL_DEBUG ON
/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml)=0
response_code=200
VSICURL:
GetFileList(/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-samples)
VSICURL: Downloading 0-18446744073709551615
(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml)...
VSICURL: Got reponse_code=206
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.hdr)=0
response_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.HDR)=0
response_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml.hdr)=0
response_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml.HDR)=0
response_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/MV-DOQQ.HDR)=0
response_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.aux)=0
response_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.AUX)=0
response_code=404
VSICURL:
GetFileSize(http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml.xml)=0
response_code=404
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/1.kml
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/1.kml
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/1.JPEG
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/1.JPEG
GDAL: GDALOpen(/vsimem/kmlsuperoverlay/0_0x14862f8, this=0x149fc60)
succeeds as JPEG.
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/2.kml
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/2.kml
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/3.kml
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/3.kml
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/4.kml
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/4.kml
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/5.kml
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/5.kml
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/6.kml
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/6.kml
VSICURL: Start download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/7.kml
VSICURL: Stop download for
http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-070501/7.kml
GDAL:
GDALOpen(/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml,
this=0x14a6280) succeeds as KMLSUPEROVERLAY.
Driver: KMLSUPEROVERLAY/Kml Super Overlay
Files:
/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml
Size is 16384, 16384
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
TOWGS84[0,0,0,0,0,0,0],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9108"]],
AUTHORITY["EPSG","4326"]]
Origin = (-122.129312658577717,37.439803353779496)
Pixel Size = (0.000004270647777,-0.000004095141704)
Metadata:
DESCRIPTION=The original is a 7008 x 6720 DOQQ of Mountain View in
1991. (Source:
http://gis.ca.gov/). This is a Region NetworkLink hierarchy of 900+
GroundOverlays each of 256 x 256 pixels arranged in a hierarchy such
that more detailed images are loaded and shown as the viewpoint
nears.
Enable the "Boxes" NetworkLink to see a LineString for
each Region. Tour the "Boxes" to visit each tile. Visit the
"A" and "B" Placemarks to see multiple levels of
hierarchy together. Use the slider on various images in the hierarchy
to see how the resolution varies and of the entire hierarchy to see
the imagery below. (Find the Google Campus...).
NAME=SuperOverlay: MV DOQQ
Image Structure Metadata:
INTERLEAVE=PIXEL
OGRCT: PROJ >= 4.8.0 features enabled
OGRCT: Source: +proj=longlat +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +no_defs
OGRCT: Target: +proj=longlat +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +no_defs
Corner Coordinates:
Upper Left (-122.1293127, 37.4398034) (122d 7'45.53"W, 37d26'23.29"N)
Lower Left (-122.1293127, 37.3727086) (122d 7'45.53"W, 37d22'21.75"N)
Upper Right (-122.0593424, 37.4398034) (122d 3'33.63"W, 37d26'23.29"N)
Lower Right (-122.0593424, 37.3727086) (122d 3'33.63"W, 37d22'21.75"N)
Center (-122.0943275, 37.4062560) (122d 5'39.58"W, 37d24'22.52"N)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
Overviews: 8192x8192, 4096x4096, 2048x2048, 1024x1024, 512x512, 256x256
Mask Flags: PER_DATASET ALPHA
Overviews of mask band: 8192x8192, 4096x4096, 2048x2048, 1024x1024,
512x512, 256x256
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
Overviews: 8192x8192, 4096x4096, 2048x2048, 1024x1024, 512x512, 256x256
Mask Flags: PER_DATASET ALPHA
Overviews of mask band: 8192x8192, 4096x4096, 2048x2048, 1024x1024,
512x512, 256x256
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue
Overviews: 8192x8192, 4096x4096, 2048x2048, 1024x1024, 512x512, 256x256
Mask Flags: PER_DATASET ALPHA
Overviews of mask band: 8192x8192, 4096x4096, 2048x2048, 1024x1024,
512x512, 256x256
Band 4 Block=256x256 Type=Byte, ColorInterp=Alpha
Overviews: 8192x8192, 4096x4096, 2048x2048, 1024x1024, 512x512, 256x256
GDAL: GDALClose(/vsimem/kmlsuperoverlay/0_0x14862f8, this=0x149fc60)
GDAL:
GDALClose(/vsicurl/http://mw1.google.com/mw-earth-vectordb/kml-samples/mv-doqq.kml,
this=0x14a6280)
-jeff
--
Jeff McKenna
MapServer Consulting and Training Services
http://www.gatewaygeomatics.com/
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