June 2020 - Pharo-users - lists.pharo.org

Re: [Pharo-users] GIS support for Pharo

by Serge Stinckwich

I create a pharo-GIS organization here: https://github.com/pharo-GIS On Fri, Jun 5, 2020 at 5:35 PM Norbert Hartl <norbert(a)hartl.name> wrote: > Wel, thatâs what I proposed. So yes from me > > Am 05.06.2020 um 10:03 schrieb StÃ©phane Ducasse <stephane.ducasse(a)inria.fr > >: > > ï»¿Serge I was thinking that it would be good to create pharo-gis > organisation. > What do you and the others think? > > S > > On 5 Jun 2020, at 03:46, Serge Stinckwich <serge.stinckwich(a)gmail.com> > wrote: > > Hi Todd, > > you can join. Everyone is welcome. > GDAL FFI integration would be great, but this is a lot of work I guess. > > Regards, > > On Fri, Jun 5, 2020 at 2:34 AM Todd Blanchard via Pharo-users < > pharo-users(a)lists.pharo.org> wrote: > >> Hi Serge, >> >> I would love to participate in getting some GIS features into Pharo. I >> think it would be a fantastic platform for GIS. >> >> My personal orientation is doing marine navigation (have boat with >> sensors, want boat to be be smarter about navigation). >> >> My main interests is in being able to render S57/S52 formats. There are >> a number of boat fans that balk at the price of expensive chart plotter >> computers and software. >> >> They have given rise to some DIY stuff. Some of it just rips code >> straight out of https://gdal.org - I think possibly a FFI integration >> with gdal might be an amazing resource. >> >> I am time constrained for when I can work on this stuff but would like it >> a lot if we at least had some core data types for simple things like >> lat/lng, regions (polygons), and a decent general map renderer. >> >> Anyhow, please include me in any conversations. Navigation (both air and >> sea) are two things I have an interest in. >> >> On Jun 3, 2020, at 8:31 PM, Serge Stinckwich <serge.stinckwich(a)gmail.com> >> wrote: >> >> 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 >> >> >> > > -- > Serge Stinckwic > âhâ > https://twitter.com/SergeStinckwich > â > > > -------------------------------------------- > StÃ©phane Ducasse > http://stephane.ducasse.free.fr / http://www.pharo.org > 03 59 35 87 52 > Assistant: Aurore Dalle > FAX 03 59 57 78 50 > TEL 03 59 35 86 16 > S. Ducasse - Inria > 40, avenue Halley, > Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza > Villeneuve d'Ascq 59650 > France > > -- Serge Stinckwic âhâ https://twitter.com/SergeStinckwich â

June 5, 2020

shape file reading

by Baveco, Hans

Hi Hernan I downloaded this shapefile directly via the browser. Indeed it wonât load, the type of shape file returned is self longAt: 33 bigEndian: false -> 577660194 where it should have answered an Integer between 0 and 31 shapeType "position 32, Integer between 0 and 31, Little Endian" ^shpBytes longAt: 33 bigEndian: false No idea what could be the cause â apparently the header of the file (the first 100 bytes) is not ok... Hans 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, HernÃ¡n

June 5, 2020

Re: [Pharo-users] GIS support for Pharo

by Norbert Hartl

Wel, thatâs what I proposed. So yes from me > Am 05.06.2020 um 10:03 schrieb StÃ©phane Ducasse <stephane.ducasse(a)inria.fr>: > > ï»¿Serge I was thinking that it would be good to create pharo-gis organisation. > What do you and the others think? > > S > >> On 5 Jun 2020, at 03:46, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: >> >> Hi Todd, >> >> you can join. Everyone is welcome. >> GDAL FFI integration would be great, but this is a lot of work I guess. >> >> Regards, >> >> On Fri, Jun 5, 2020 at 2:34 AM Todd Blanchard via Pharo-users <pharo-users(a)lists.pharo.org> wrote: >>> Hi Serge, >>> >>> I would love to participate in getting some GIS features into Pharo. I think it would be a fantastic platform for GIS. >>> >>> My personal orientation is doing marine navigation (have boat with sensors, want boat to be be smarter about navigation). >>> >>> My main interests is in being able to render S57/S52 formats. There are a number of boat fans that balk at the price of expensive chart plotter computers and software. >>> >>> They have given rise to some DIY stuff. Some of it just rips code straight out of https://gdal.org - I think possibly a FFI integration with gdal might be an amazing resource. >>> >>> I am time constrained for when I can work on this stuff but would like it a lot if we at least had some core data types for simple things like lat/lng, regions (polygons), and a decent general map renderer. >>> >>> Anyhow, please include me in any conversations. Navigation (both air and sea) are two things I have an interest in. >>> >>>> On Jun 3, 2020, at 8:31 PM, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: >>>> >>>> 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 Stinckwich >>>> https://twitter.com/SergeStinckwich >>> >> >> >> -- >> Serge Stinckwicâhâ >> https://twitter.com/SergeStinckwich >> â > > -------------------------------------------- > StÃ©phane Ducasse > http://stephane.ducasse.free.fr / http://www.pharo.org > 03 59 35 87 52 > Assistant: Aurore Dalle > FAX 03 59 57 78 50 > TEL 03 59 35 86 16 > S. Ducasse - Inria > 40, avenue Halley, > Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza > Villeneuve d'Ascq 59650 > France >

June 5, 2020

Re: [Pharo-users] GIS support for Pharo

by serge.stinckwich＠gmail.com

I think this is a good idea. We will discuss with Norbert and Hernan during put meeting next Thursday. Regards Sent from my iPhone > On 5 Jun 2020, at 16:17, HernÃ¡n Morales Durand <hernan.morales(a)gmail.com> wrote: > > ï»¿ > > >> El vie., 5 jun. 2020 a las 5:03, StÃ©phane Ducasse (<stephane.ducasse(a)inria.fr>) escribiÃ³: >> Serge I was thinking that it would be good to create pharo-gis organisation. >> What do you and the others think? >> > > I think it is a good idea! > > Cheers, > > HernÃ¡n > >> S >> >>> On 5 Jun 2020, at 03:46, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: >>> >>> Hi Todd, >>> >>> you can join. Everyone is welcome. >>> GDAL FFI integration would be great, but this is a lot of work I guess. >>> >>> Regards, >>> >>>> On Fri, Jun 5, 2020 at 2:34 AM Todd Blanchard via Pharo-users <pharo-users(a)lists.pharo.org> wrote: >>>> Hi Serge, >>>> >>>> I would love to participate in getting some GIS features into Pharo. I think it would be a fantastic platform for GIS. >>>> >>>> My personal orientation is doing marine navigation (have boat with sensors, want boat to be be smarter about navigation). >>>> >>>> My main interests is in being able to render S57/S52 formats. There are a number of boat fans that balk at the price of expensive chart plotter computers and software. >>>> >>>> They have given rise to some DIY stuff. Some of it just rips code straight out of https://gdal.org - I think possibly a FFI integration with gdal might be an amazing resource. >>>> >>>> I am time constrained for when I can work on this stuff but would like it a lot if we at least had some core data types for simple things like lat/lng, regions (polygons), and a decent general map renderer. >>>> >>>> Anyhow, please include me in any conversations. Navigation (both air and sea) are two things I have an interest in. >>>> >>>>> On Jun 3, 2020, at 8:31 PM, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: >>>>> >>>>> 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 Stinckwich >>>>> https://twitter.com/SergeStinckwich >>>> >>> >>> >>> -- >>> Serge Stinckwich >>> https://twitter.com/SergeStinckwich >> >> -------------------------------------------- >> StÃ©phane Ducasse >> http://stephane.ducasse.free.fr / http://www.pharo.org >> 03 59 35 87 52 >> Assistant: Aurore Dalle >> FAX 03 59 57 78 50 >> TEL 03 59 35 86 16 >> S. Ducasse - Inria >> 40, avenue Halley, >> Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza >> Villeneuve d'Ascq 59650 >> France >>

June 5, 2020

Re: [Pharo-users] GIS support for Pharo

by HernÃ¡n Morales Durand

El vie., 5 jun. 2020 a las 5:03, StÃ©phane Ducasse (< stephane.ducasse(a)inria.fr>) escribiÃ³: > Serge I was thinking that it would be good to create pharo-gis > organisation. > What do you and the others think? > > I think it is a good idea! Cheers, HernÃ¡n > S > > On 5 Jun 2020, at 03:46, Serge Stinckwich <serge.stinckwich(a)gmail.com> > wrote: > > Hi Todd, > > you can join. Everyone is welcome. > GDAL FFI integration would be great, but this is a lot of work I guess. > > Regards, > > On Fri, Jun 5, 2020 at 2:34 AM Todd Blanchard via Pharo-users < > pharo-users(a)lists.pharo.org> wrote: > >> Hi Serge, >> >> I would love to participate in getting some GIS features into Pharo. I >> think it would be a fantastic platform for GIS. >> >> My personal orientation is doing marine navigation (have boat with >> sensors, want boat to be be smarter about navigation). >> >> My main interests is in being able to render S57/S52 formats. There are >> a number of boat fans that balk at the price of expensive chart plotter >> computers and software. >> >> They have given rise to some DIY stuff. Some of it just rips code >> straight out of https://gdal.org - I think possibly a FFI integration >> with gdal might be an amazing resource. >> >> I am time constrained for when I can work on this stuff but would like it >> a lot if we at least had some core data types for simple things like >> lat/lng, regions (polygons), and a decent general map renderer. >> >> Anyhow, please include me in any conversations. Navigation (both air and >> sea) are two things I have an interest in. >> >> On Jun 3, 2020, at 8:31 PM, Serge Stinckwich <serge.stinckwich(a)gmail.com> >> wrote: >> >> 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 >> >> >> > > -- > Serge Stinckwic > h > https://twitter.com/SergeStinckwich > > > -------------------------------------------- > StÃ©phane Ducasse > http://stephane.ducasse.free.fr / http://www.pharo.org > 03 59 35 87 52 > Assistant: Aurore Dalle > FAX 03 59 57 78 50 > TEL 03 59 35 86 16 > S. Ducasse - Inria > 40, avenue Halley, > Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza > Villeneuve d'Ascq 59650 > France > >

June 5, 2020

Re: [Pharo-users] Moose install

by StÃ©phane Ducasse

benoit I did not have the time to check but may be we should put it on the github readme if not already there. > On 5 Jun 2020, at 09:38, VERHAEGHE Benoit <badetitou(a)gmail.com> wrote: > > Hello, > > To install Moose, the easiest way is to use the Pharo Launcher. > (it is under the "official distribution" category) > > To install Moose from an already existing image you can execute the following script: > > Metacello new > baseline: 'Moose'; > repository: 'github://moosetechnology/Moose:development/src'; > load. > I believe the ConfigurationOf is broken, we did not maintain it since we are on github and we only use baselineOf. > > I hope I answer your questions. > > BenoÃ®t Verhaeghe > > Le 05/06/2020 Ã 01:57, Michael Burns via Pharo-users a Ã©crit : > -- > BenoÃ®t Verhaeghe > badetitou.github.io > > benoit.verhaeghe(a)berger-levrault.com <mailto:benoit.verhaeghe@berger-levrault.com> > R&D Engineer at Berger-Levrault > benoit.verhaeghe(a)inria.fr <mailto:benoit.verhaeghe@inria.fr> > PHD student at Inria-Lille--Nord-Europe -------------------------------------------- StÃ©phane Ducasse http://stephane.ducasse.free.fr / http://www.pharo.org 03 59 35 87 52 Assistant: Aurore Dalle FAX 03 59 57 78 50 TEL 03 59 35 86 16 S. Ducasse - Inria 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza Villeneuve d'Ascq 59650 France

June 5, 2020

Re: [Pharo-users] GIS support for Pharo

by StÃ©phane Ducasse

Serge I was thinking that it would be good to create pharo-gis organisation. What do you and the others think? S > On 5 Jun 2020, at 03:46, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: > > Hi Todd, > > you can join. Everyone is welcome. > GDAL FFI integration would be great, but this is a lot of work I guess. > > Regards, > > On Fri, Jun 5, 2020 at 2:34 AM Todd Blanchard via Pharo-users <pharo-users(a)lists.pharo.org <mailto:pharo-users@lists.pharo.org>> wrote: > Hi Serge, > > I would love to participate in getting some GIS features into Pharo. I think it would be a fantastic platform for GIS. > > My personal orientation is doing marine navigation (have boat with sensors, want boat to be be smarter about navigation). > > My main interests is in being able to render S57/S52 formats. There are a number of boat fans that balk at the price of expensive chart plotter computers and software. > > They have given rise to some DIY stuff. Some of it just rips code straight out of https://gdal.org <https://gdal.org/> - I think possibly a FFI integration with gdal might be an amazing resource. > > I am time constrained for when I can work on this stuff but would like it a lot if we at least had some core data types for simple things like lat/lng, regions (polygons), and a decent general map renderer. > > Anyhow, please include me in any conversations. Navigation (both air and sea) are two things I have an interest in. > >> On Jun 3, 2020, at 8:31 PM, Serge Stinckwich <serge.stinckwich(a)gmail.com <mailto:serge.stinckwich@gmail.com>> wrote: >> >> 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 <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 <https://github.com/zweidenker/GeoJSON> >> - ESRI ascii raster, done by Stephane recently: https://github.com/Ducasse/ESRI-ASCII-Raster <https://github.com/Ducasse/ESRI-ASCII-Raster> >> - shapefile support by Hernan: http://smalltalkhub.com/#!/~hernan/Shapes <http://smalltalkhub.com/#!/~hernan/Shapes> >> (to be moved to github) >> - I found this project also: http://www.squeaksource.com/gekon.html <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 <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 Stinckwich >> https://twitter.com/SergeStinckwich <https://twitter.com/SergeStinckwich> > > > > -- > Serge Stinckwicâhâ > https://twitter.com/SergeStinckwich <https://twitter.com/SergeStinckwich> > â -------------------------------------------- StÃ©phane Ducasse http://stephane.ducasse.free.fr / http://www.pharo.org 03 59 35 87 52 Assistant: Aurore Dalle FAX 03 59 57 78 50 TEL 03 59 35 86 16 S. Ducasse - Inria 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza Villeneuve d'Ascq 59650 France

June 5, 2020

Re: [Pharo-users] Zinc WebSocket usage

by Erik Stel

Hi Sven, (I hope this message does arrive. Sorry for the late reply. I have not been able to use the browser-interface for the ML for a number of days now. An admin could not figure this out either. So resorting to actually using a mail ;-) My architecture is one in which client and server are working fairly independent. A client or server can send the other a message whenever it wants (and there is no response expected). The client is responsible for setting up the connection and keeping it âopenâ (for the server to reach the client). When the client wants it can however disconnect and reconnect at a later time. The server will still be there (this is not visible in the example of course). Both client and server keep track of messages which canât be sent when the connection is (temporarily) down. So I have to have a separate process to read messages from the process that writes messages to the WebSocket. In a test I discovered that closing the connection from the client did not get noticed in the process doing the reading. Iâd like that process to stop running fairly directly since it is performing some additional logic. Now it takes a timeout. Closing the connection using the specified workaround does get noticed and works for me. But Iâm unsure if this is a good approach and thereâs the risk it will not work on a next update. A shorter timeout could be a solution but does mean Iâm going into a âpollingâ mode. So I think I prefer my workaround over setting a very short timeout. If you have a better solution though, please let me know. Kind regards, Erik

June 5, 2020

Re: [Pharo-users] Moose install

by VERHAEGHE Benoit

Hello, To install Moose, the easiest way is to use the Pharo Launcher. (it is under the "official distribution" category) To install Moose from an already existing image you can execute the following script: |Metacello new baseline: 'Moose'; repository: 'github://moosetechnology/Moose:development/src'; load. | â I believe the ConfigurationOf is broken, we did not maintain it since we are on github and we only use baselineOf. I hope I answer your questions. BenoÃ®t Verhaeghe Le 05/06/2020 Ã 01:57, Michael Burns via Pharo-users a Ã©critÂ : -- BenoÃ®t Verhaeghe badetitou.github.io benoit.verhaeghe(a)berger-levrault.com R&D Engineer at Berger-Levrault benoit.verhaeghe(a)inria.fr PHD student at Inria-Lille--Nord-Europe

June 5, 2020

Re: [Pharo-users] GIS support for Pharo

by Baveco, Hans

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? Hans From: HernÃ¡n Morales Durand <hernan.morales(a)gmail.com> Sent: vrijdag 5 juni 2020 0:25 To: Any question about pharo is welcome <pharo-users(a)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.baveco(a)wur.nl<mailto:hans.baveco@wur.nl>>) escribiÃ³: 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, HernÃ¡n 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.stinckwich(a)gmail.com<mailto:serge.stinckwich@gmail.com>> Sent: donderdag 4 juni 2020 5:32 To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org<mailto: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

June 5, 2020