[gdal-dev] WMTS gdal_translate vs RasterIO

[Rahkonen Jukka]

Hi,

Capture and show the http request that your code generates and sends to the WMTS server. Does it work if you send the same request with curl or with a browser? Or does the error come before the GetTile request is generated?

-Jukka Rahkonen-

Lähettäjä: Michał Kowalczuk <michkowalczuk at gmail.com>
Lähetetty: perjantai 30. elokuuta 2024 9.59
Vastaanottaja: Robert Coup <robert.coup at koordinates.com>
Kopio: gdal-dev at lists.osgeo.org; Rahkonen Jukka <jukka.rahkonen at maanmittauslaitos.fi>
Aihe: Re: [gdal-dev] WMTS gdal_translate vs RasterIO

Sorry for incorrect sample commands in the last message.
I fixed it. The problem stays the same, because the problem was in email not in my tested code.
gdal_translate -srcwin 0 0 1073741760 1553779 -outsize 691 1 "WMTS:https://basemap.nationalmap.gov/arcgis/rest/services/USGSHydroCached/MapServer/WMTS/1.0.0/WMTSCapabilities.xml,layer=USGSHydroCached,tilematrixset=default028mm" tile.png

GDALDatasetRasterIO(
handle_to_wmts_subdataset,
eRWFlag=GF_Read,
nXOff=0,
nYOff=0,
nXSize=1073741760,
nYSize=1553779,
pBuffer - buffer for data,
nBufXSize=691,
nBufYSize=1,
eBufType=GDT_Byte,
nBandCount=4,
panBandMap=[bIndex ,gIndex, rIndex, aIndex],
nPixelSpace=4,
nLineSpace=0,
nBandSpace=1)

Can anyone help me to understand why gdal_translate works and generates output file, where GDALRasterIO raises error:
Requested (0,0) of size 1073741760x1553779 on raster of 1073741756x1347126255?

czw., 29 sie 2024 o 12:22 Michał Kowalczuk <michkowalczuk at gmail.com<mailto:michkowalczuk at gmail.com>> napisał(a):
I see. I will double check commands, fix and return to this.

W dniu czw., 29.08.2024 o 12:20 Robert Coup <robert.coup at koordinates.com<mailto:robert.coup at koordinates.com>> napisał(a):
Hi Michał,

In addition to Jukka's key point:

  nBufXSize=1,
  nBufYSize=691,

appears to be backwards wrt:

  -outsize 691 1

Rob :)
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