Hi Hans,
El jue., 4 jun. 2020 a las 6:07, Baveco, Hans (<hans.bav...@wur.nl>) escribió: > Would be an interesting project.. > > An old link to possibly still useful code: > > > > http://wiki.squeak.org/squeak/3317 > > > > > > Btw the shapefile support, from the ESRI spec, was done by me and is still > available on http://www.squeaksource.com/@CUT95k_uXmPU4uXY/HCmgtrop. > Thank you for the clarification (and actually sharing your work with ESRI files!) I added proper credits in the Github forked repo : https://github.com/hernanmd/Shapes > I use it daily. I may have some fixes/additions, but in general the code > as provided works well (I suppose the code at smalltalkhub is still mostly > the same). Some shapefile formats are still missing, mostly because I never > encountered them.. > You mean some types are missing? Because I get this error when I try to read some SHP files: "Types > 20 are not yet accounted for" I wrote this script to reproduce: | shpE legend urlRoot urlESRIFilePrefix urlESRIFileShp urlPath response fileRef | " Download Shapefile resources " urlRoot := ' https://github.com/nvkelso/natural-earth-vector/blob/master/110m_cultural/'. urlESRIFilePrefix := 'ne_110m_populated_places'. urlESRIFileShp := urlESRIFilePrefix , '.shp'. urlPath := urlRoot , urlESRIFilePrefix. #('.shx' '.dbf' '.shp') do: [ : ext | | url | url := (urlPath , ext , '?raw=true') asZnUrl. (response := ZnEasy get: url) isSuccess ifFalse: [ self error: 'Cannot download file' ]. fileRef := FileSystem disk workingDirectory / (urlESRIFilePrefix , ext). fileRef writeStreamDo: [ : stream | stream nextPutAll: ((ZnByteEncoder newForEncoding: 'koi8r') decodeBytes: response contents ) ] ]. Once downloaded: | urlESRIFilePrefix urlESRIFileShp shpE | urlESRIFilePrefix := 'ne_110m_populated_places'. urlESRIFileShp := urlESRIFilePrefix , '.shp'. " Load and display it in Morphic " shpE := ShapeEnsemble fromFile: urlESRIFileShp. Maybe it's related with the fact they are encoded as koi8r? I checked with Zinc downloading first from the browser: | shpFile | shpFile := 'ne_110m_admin_0_countries.shp' asFileReference. [ shpFile binaryReadStreamDo: [ : in | (ZnCharacterEncoder detectEncoding: in upToEnd) identifier ] ] on: ZnCharacterEncodingError do: [ nil ]. Cheers, Hernán To read a complete shapefile one also needs to read dbf files. This was > another substantial effort > http://www.squeaksource.com/@Y4HhnL90iyA2TmAb/X0sPqshM; luckily there > was an older implementation.available to build upon. > > Not sure whether nowadays there are other ways to read/write files old > DBASE format files... > > > > Cheers, > > > > Hans Baveco > > > > > > > > > > *From:* Serge Stinckwich <serge.stinckw...@gmail.com> > *Sent:* donderdag 4 juni 2020 5:32 > *To:* Any question about pharo is welcome <pharo-users@lists.pharo.org> > *Subject:* [Pharo-users] GIS support for Pharo > > > > Dear all, > > > > there was already some discussion in the list about GIS support for Pharo > previously. > > > > Working on CORMAS multi-agent simulation platform: > https://github.com/cormas/cormas some developers feel the need to have > more GIS support for Pharo. > > > > I know of existing GIS software: > > - GeoJSON by Zweidenker: https://github.com/zweidenker/GeoJSON > > - ESRI ascii raster, done by Stephane recently: > https://github.com/Ducasse/ESRI-ASCII-Raster > > - shapefile support by Hernan: http://smalltalkhub.com/#!/~hernan/Shapes > > (to be moved to github) > > - I found this project also: http://www.squeaksource.com/gekon.html > > > > I know that Etienne Delay is also interested by GIS support and propose to > implement OpenGIS model support: > https://github.com/cormas/cormas/issues/139 > > > > Can we try to unite and maybe create a pharo-GIS organization on github to > federate our efforts? > > > Cheers, > > -- > > Serge Stinckwic > > h > > https://twitter.com/SergeStinckwich > > >
