---------- Forwarded message --------- De: Hernán Morales Durand <hernan.mora...@gmail.com> Date: vie., 5 jun. 2020 a las 16:54 Subject: Re: [Pharo-users] GIS support for Pharo To: Baveco, Hans <hans.bav...@wur.nl>
El vie., 5 jun. 2020 a las 4:27, Baveco, Hans (<hans.bav...@wur.nl>) escribió: > Thanks Hernan! > > > > I will try to find out what the problem is with your shape file. > > > > Btw is the code for reading/writing dbf files already available on github? > > > Yes it is: https://github.com/hernanmd/XBase Cheers, Hernán > Hans > > > > *From:* Hernán Morales Durand <hernan.mora...@gmail.com> > *Sent:* vrijdag 5 juni 2020 0:25 > *To:* Any question about pharo is welcome <pharo-users@lists.pharo.org> > *Subject:* Re: [Pharo-users] GIS support for Pharo > > > > 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 > > > >
