Re: [OSM-talk] Nik4: mapnik → image
Ilya, On 12/06/2014 10:19 PM, Ilya Zverev wrote: I see that it can split a large image into smaller mapnik rendering jobs and combine them after, with --tiles. That's already very useful but is it also possible to actually keep the tiles (e.g. for building a GDAL VRT from them)? This would require a separate .pgw file for each tile. Thanks for the suggestion, I've just published release 1.5 with `--just-tiles` option: when used, it does not merge tiles, but keeps them, and creates ozi/wld files for each if requested. I've tested it with gdal_merge. That's great, really useful. Thank you. Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org ## N49°00'09 E008°23'33 ___ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Nik4: mapnik → image
Today I have published Nik4. It makes everything easier. I see that it can split a large image into smaller mapnik rendering jobs and combine them after, with --tiles. That's already very useful but is it also possible to actually keep the tiles (e.g. for building a GDAL VRT from them)? This would require a separate .pgw file for each tile. Thanks for the suggestion, I've just published release 1.5 with `--just-tiles` option: when used, it does not merge tiles, but keeps them, and creates ozi/wld files for each if requested. I've tested it with gdal_merge. IZ ___ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Nik4: mapnik → image
Zverik, On 05/16/14 07:12, Ilya Zverev wrote: Today I have published Nik4. It makes everything easier. I see that it can split a large image into smaller mapnik rendering jobs and combine them after, with --tiles. That's already very useful but is it also possible to actually keep the tiles (e.g. for building a GDAL VRT from them)? This would require a separate .pgw file for each tile. Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org ## N49°00'09 E008°23'33 ___ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Nik4: mapnik → image
2014-05-16 11:48 GMT+02:00 Ilya Zverev zve...@textual.ru: Yes, that's a bug I've also encountered when trying to render 1000x26000 strip. Looks like an overflow error in Mapnik. Use --tiles parameter (I'd suggest --tiles 3): it will generate the image in 9 parts and then merge them with Imagemagick. Can I feed it with the classic render.xml style (no carto), or does it expect a carto-style? In the second attempt I'm omitting the dimensions and only defining a zoom level, a bounding box and a output resolution. It expects a regular mapnik xml, not cartocss or cascadenik. CartoCSS projects should be processed with carto -l. Could get the italy rendering done within some further tries, but now I'm stuck with Rome. I've done a lot of rendering attempts, but I hardly ever got what I expected (would want the whole city as z17 or z16, but all I can manage to get is z14). Even with tiles 12 it fails silently on z15 with this commandline: nik4.py -b 12.35 41.777 12.64 42 -p 300 -z 15 --tiles 12 osm-render-noicons.xml roma_300dpi.png The single tiles are not so big then (ca. 1200 x 1800 pixels) but still the map is of a far bigger place (in low zoom around 6 or 7 I guess) with my area of interest sitting tiny in the upper left corner. Any ideas? cheers, Martin ___ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Nik4: mapnik → image
Ilya, a big thank you! This looks convenient and promising, am waiting now for the second output, the first one, created like this: nik4.py -b 5.8 35.5 19 48.1 --ppi 300 --size-px 28108 36000 osm-render.xml italiabig300dpi.png didn't work like expected (I got a tiny map in the upper left corner and all the rest was sea-blue). Can I feed it with the classic render.xml style (no carto), or does it expect a carto-style? In the second attempt I'm omitting the dimensions and only defining a zoom level, a bounding box and a output resolution. cheers, Martin ___ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Nik4: mapnik → image
Ilya, a big thank you! This looks convenient and promising, am waiting now for the second output, the first one, created like this: nik4.py -b 5.8 35.5 19 48.1 --ppi 300 --size-px 28108 36000 osm-render.xml italiabig300dpi.png didn't work like expected (I got a tiny map in the upper left corner and all the rest was sea-blue). Yes, that's a bug I've also encountered when trying to render 1000x26000 strip. Looks like an overflow error in Mapnik. Use --tiles parameter (I'd suggest --tiles 3): it will generate the image in 9 parts and then merge them with Imagemagick. Can I feed it with the classic render.xml style (no carto), or does it expect a carto-style? In the second attempt I'm omitting the dimensions and only defining a zoom level, a bounding box and a output resolution. It expects a regular mapnik xml, not cartocss or cascadenik. CartoCSS projects should be processed with carto -l. IZ ___ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
[OSM-talk] Nik4: mapnik → image
Hi! I recently needed to create a big georeferenced image from a mapnik style file, and found out no image exporting tool currently offers more than a direct interface to mapnik's options. That is, I could not get image in 300 dpi for printing on an A5 sheet, I had to understand what scale_factor is, and what is the default resolution, and why lines had become so thick. And I'm a programmer — imagine a confusion of a regular user! Today I have published Nik4. It makes everything easier. Grab a 800x600 image at z13? -c LON LAT -x 800 600 -z 13 — and no suprises like when the output image differs from osm.org (nik2img puzzled me with that one). Print a region in 300 dpi on A5? -a 5 --ppi 300 --bbox X1 Y1 X2 Y2. You don't have to think about scale_factor ever. Make a very large image? No problem, use --tiles 4 and wait a bit; you won't run out of memory. See https://github.com/Zverik/Nik4 for an extensive description and installation instructions (easy_install nik4 — there, no more instructions needed). Print more maps. IZ ___ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
