[mapserver-users] Use Ground Control Points from GeoTIFF

[Rahkonen Jukka (MML)]

Hi Jesper,

Poor performance may mean that your original tiff is not optimized for server usage and you should rewrite it in any case or at least add some overviews. Gdalinfo report about the original tiff and .vrt would probably give some useful information. If you select to warp images physically (would be my choise BTW) please try to do it right. You should find good GDAL commands from these slides https://www.slideshare.net/geosolutions/geoserver-on-steroids-foss4g-2015.

-Jukka Rahkonen-

Lähettäjä: Jesper Kempe <jesper.kempe at gmail.com<mailto:jesper.kempe at gmail.com>>
Lähetetty: torstai 3. syyskuuta 2020 15.18
Vastaanottaja: Rahkonen Jukka (MML) <jukka.rahkonen at maanmittauslaitos.fi<mailto:jukka.rahkonen at maanmittauslaitos.fi>>
Kopio: Jeff McKenna <jmckenna at gatewaygeomatics.com<mailto:jmckenna at gatewaygeomatics.com>>; Mapserver <mapserver-users at lists.osgeo.org<mailto:mapserver-users at lists.osgeo.org>>
Aihe: Re: [mapserver-users] Use Ground Control Points from GeoTIFF

Hi Jukka

Sorry about that, I forgot that yesterday.

I did a test now and that actually works!

Changing DATA to the vrt-file and setting

PROJECTION
  "init=epsg:3857"
END

creates an image with sat.tif placed correctly!

$ shp2img -m icesat.map -o /data/temp/Jesper/ttt.png -all_debug 5
msLoadMap(): 0.014s
msDrawMap(): rendering using outputformat named png (AGG/PNG).
msDrawRasterLayerLow(sat): entering.
msResampleGDALToMap in effect: cellsize = 4202.211585
msDrawGDAL(sat): using RAW_WINDOW=0 0 12531 12770, dst=0,0,279,284
msDrawRasterLayerGDAL(): red,green,blue,alpha bands = 1,2,3,4
msDrawMap(): Layer 0 (sat), 557.242s
msDrawMap(): Drawing Label Cache, 0.000s
msDrawMap() total time: 557.243s
msSaveImage(/data/temp/Jesper/ttt.png) total time: 0.119s
msFreeMap(): freeing map at 0x7b1f50.
freeLayer(): freeing layer at 0x7ba080.
freeLayer(): freeing layer at 0x7bb760.
shp2img total time: 557.378s

BUT, note 557.378s on the last row...

Also a WMS-request works but takes about 4 minutes to complete!

It looks like I need to reproject all files new GeoTIFFs to get a decent speed.

Thanks for all the replies!

Jesper


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/mapserver-users/attachments/20200903/faf4dc96/attachment-0001.html>