hey Jukka, please try r4945 or later.
..ede On 27.06.2016 11:47, Rahkonen Jukka (MML) wrote: > Yes, sure, having all as strings is a good start. > > > -Jukka- > > edgar soldin wrote: > >> Jukka, > >> could you live with all attributes being read as Strings for now? ..ede > > On 27.06.2016 08:35, Jukka Rahkonen wrote: >>> Hi, >>> >>> Json datatypes http://www.tutorialspoint.com/json/json_data_types.htm do >>> not map perfectly with OJ datatypes. Strings can be separated from numbers, >>> though, but there is another problem in missing schema. Each feature can >>> have different attributes. >>> >>> I believe that GDAL is scanning the GeoJSON file twice for finding all the >>> attributes which appear in the data and analyzing their datatypes. Rather >>> often GeoJSON is converted from GIS data and then schema is fixed so that >>> all features have same set of attributes and empty ones are marked as NULL. >>> Still it is hard to know the type of attribute if it is NULL. >>> >>> Code for reading GeoJSON with GeoTools is at >>> https://github.com/geotools/geotools/tree/master/modules/unsupported/g >>> eojson >>> >>> An easy start could be to read the first one feature and build schema >>> with attribute types double, string, boolean. But what to do if there >>> are null values? Read first hundred? Read until first not null? Or let >>> user make a header line with schema into a separate file >>> "basename.jsont" like with the GDAL CSV driver >>> http://www.gdal.org/drv_csv.html >>> >>> attr_1:string;attr_2:integer;attr_3:double >>> >>> Sorry that I can't give simple answers, I thought it would be easier and >>> handled by JTS already. >>> >>> -Jukka- >>> >>> edgar.sol...@web.de kirjoitti 2016-06-26 17:19: >>>> hey Jukka, >>>> >>>> attributes do not seem to carry a type in GeoJSON.. any idea how this >>>> is supposed to be parsed? >>>> >>>> ..ede >>>> >>>> On 23.06.2016 16:20, Jukka Rahkonen wrote: >>>>> Hi Ede, >>>>> >>>>> Please find attached. I included some small samples in both JML and >>>>> GeoJSON. For the conversion I used ogr2ogr: >>>>> >>>>> ogr2ogr -f geojson output.json input.jml >>>>> >>>>> Test data is not perfect: >>>>> >>>>> - I just digitized some features and they may be outside the real >>>>> area of the EPSG:4326 which is default in GeoJSON (-90,-180,90,180) >>>>> - GDAL warned that DateTime type is not natively supported >>>>> >>>>> For handling projections with ogr2ogr use source and target srs >>>>> parameters as >>>>> >>>>> ogr2ogr -f geojson -s_srs epsg:3067 -t_srs epsg:4326 output.json >>>>> input.jml >>>>> >>>>> -Jukka- >>>>> >>>>> edgar.sol...@web.de kirjoitti 2016-06-23 15:56: >>>>>> Jukka, >>>>>> >>>>>> do you have an example dataset to tiner with for me? >>>>>> >>>>>> ..ede > > ------------------------------------------------------------------------------ > Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San > Francisco, CA to explore cutting-edge tech and listen to tech luminaries > present their vision of the future. This family event has something for > everyone, including kids. Get more information and register today. > http://sdm.link/attshape > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > ------------------------------------------------------------------------------ > Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San > Francisco, CA to explore cutting-edge tech and listen to tech luminaries > present their vision of the future. This family event has something for > everyone, including kids. Get more information and register today. > http://sdm.link/attshape > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
