search

publiclab / mapknitter

Upload your own aerial images, position (rubbersheet) them in a web interface over existing map data, and share via web or composite and export for print.
http://mapknitter.org
GNU General Public License v3.0
267 stars 210 forks source link

very (geographically) large images may fail to export #167

Open cspencer905 opened 9 years ago

cspencer905 commented 9 years ago

I'm not sure if I've done something wrong with the settings but this issue happens with multiple images I've tried, apparently in the same position with each image. I've made sure the extent of the map exceeds the image and have tried locking/unlocking the photo as troubleshooting. Any thoughts?

export issue export issue2

jywarren commented 9 years ago

Hi, what does the export itself look like? Thanks for reporting!

Also, can you link to the map so we can check if the images have any odd metadata or anything that could be confusing MapKnitter? On Apr 21, 2015 9:53 AM, "cspencer905" notifications@github.com wrote:

I'm not sure if I've done something wrong with the settings but this issue happens with multiple images I've tried, apparently in the same position with each image. I've made sure the extent of the map exceeds the image and have tried locking/unlocking the photo as troubleshooting. Any thoughts?

[image: export issue] https://cloud.githubusercontent.com/assets/11618945/7253577/a233eafe-e835-11e4-84f7-2d812bbf3512.png [image: export issue2] https://cloud.githubusercontent.com/assets/11618945/7253578/a433d72e-e835-11e4-863e-de9b780a3517.png

— Reply to this email directly or view it on GitHub https://github.com/publiclab/mapknitter/issues/167.

cspencer905 commented 9 years ago

http://mapknitter.org/maps/gournia

The geoTIFFS illustrated in the image above are the exports.

cspencer905 commented 9 years ago

I have also tried another image (the current image placed on this map is this second try) which ended with a different error. Once placing the map, I use the export functionality which it is completed suscpiciously fast within a couple seconds. When I go to export as a geoTIFF, in the drop down window this format is the only format available (no JPG, OSM, nothing). Clicking this sends me to the error page: http://mapknitter.org/export/geotiff/gournia.tif providing no further information about the error. This suggests the export is not actually happening. I have tried this on both Google Chrome and Mozilla web browsers, and only appears to happen when there is only one image. dl-issue

jywarren commented 9 years ago

Sorry we haven't been able to help out on this yet! Juggling a few different bugs at the moment. Have bumped this up onto our urgent list. Thanks for your help reporting it.

jywarren commented 9 years ago

Hi, it looks like you just tried exporting again, and it failed; the site also saw some bumpiness. I'm going to take a look at this now, sorry!

jywarren commented 9 years ago

It looks like that last attempt to export also didn't work? Hmm. It may be in part that this is just a very large-scale map; could we try turning the resolution down more? The slider doesn't go any lower, but I could tweak that too to allow, say, a 350 cm/px export?

cspencer905 commented 9 years ago

Could the scale of the map be a reason why the first maps I tried (the first set of images in this post) also failed to export the entire image?

jywarren commented 9 years ago

It's possible -- say, if the machine ran out of memory or something partway through exporting? Do you want me to try making it possible to set a lower resolution?

On Mon, May 4, 2015 at 12:36 PM, Christine notifications@github.com wrote:

Could the scale of the map be a reason why the first maps I tried (the first set of images in this post) also failed to export the entire image?

— Reply to this email directly or view it on GitHub https://github.com/publiclab/mapknitter/issues/167#issuecomment-98774422 .

cspencer905 commented 9 years ago

Yes it would greatly appreciated. I have been having this issue with other maps I have tried to export and would be happy to know if this was the issue.

jywarren commented 9 years ago

I'm sorry to say I have to write the Web Working Group's monthly report this afternoon, but will try to work on this after that. Thanks for your patience.

On Mon, May 4, 2015 at 12:56 PM, Christine notifications@github.com wrote:

Yes it would greatly appreciated. I have been having this issue with other maps I have tried to export and would be happy to know if this was the issue.

— Reply to this email directly or view it on GitHub https://github.com/publiclab/mapknitter/issues/167#issuecomment-98777991 .

jywarren commented 9 years ago

Hi, cspenser905 - sorry, I tried a few different things and haven't been able to get this to work. I'm going to change the name of the issue to reflect the cause we've semi-discovered. I hope you've been able to find another solution -- one I could suggest would be using GDAL (gdal.org) directly, which is what MapKnitter does anyways -- especially since your source images are already projected and you won't need any distortion, just coordinate system metadata, to form a correct GeoTiff. And gdal2tiles.py, also in that suite of utilities, will get you tiles etc.

Apologies again!

jywarren commented 9 years ago

Actually i see you are distorting a bit -- but GDAL does that too, with provided GCPs (geographic control points). You might also try Map Warper, also based on GDAL: http://maps.nypl.org/warper