[OSGeo-Discuss] Detect and define the coordinate system of gis data with no projection information automatically

Eric Brelsford ebrelsford at gmail.com
Wed Aug 31 15:16:06 PDT 2016 

I've been working on something pretty similar called projestions
("projection" + "suggestions"). It has an API
<https://github.com/ebrelsford/projestions#api>, there's a demo
<https://projest.io/ns/>, and a QGIS plugin
<http://plugins.qgis.org/plugins/Projestions/> too if you're interested.

eric

On Wed, Aug 31, 2016 at 3:24 PM Julien Moquet <moquet.julien at gmail.com>
wrote:

> I am julien2512
>
> :)
>
> Le 31 août 2016 8:17 AM, "Luí­s de Sousa" <luis.de.sousa at protonmail.ch> a
> écrit :
>
>> Good, three is already a group!
>>
>> The strategy will be to define the data model and the templates while in
>> parallel requiring formal endorsement from OSGeo. A project like this can
>> only succeed if backed by the foundation.
>>
>> Please send me your GitHub handles. I would also ask you to link to your
>> OSGeo member page in your bio (Wiki user page).
>>
>> Luís
>>
>> -------- Original Message --------
>> Subject: Re: [OSGeo-Discuss] Detect and define the coordinate system of
>> gis data with no projection information automatically
>> Local Time: 30 August 2016 8:13 PM
>> UTC Time: 30 August 2016 18:13
>> From: manfred at egger-gis.at
>> To: moquet.julien at gmail.com
>> luis.de.sousa at protonmail.ch,discuss at lists.osgeo.org
>>
>> OK. I want to join the new github group, too.
>>
>> Best regards,
>>
>> Manfred
>>
>> -----Original Message-----
>> From: "Julien Moquet" <moquet.julien at gmail.com>
>> Sent: Tuesday, August 30, 2016 1:04pm
>> To: "Luí­s de Sousa" <luis.de.sousa at protonmail.ch>
>> Cc: discuss at lists.osgeo.org, manfred at egger-gis.at
>> Subject: Re: [OSGeo-Discuss] Detect and define the coordinate system of
>> gis data with no projection information automatically
>>
>> Set me into !
>>
>> Julien.
>>
>> Le 30 août 2016 11:34, "Luí­s de Sousa" <luis.de.sousa at protonmail.ch> a
>> écrit :
>>
>> > Hi Julien et al.,
>> >
>> > My experience with Wikis is mostly negative, however, the GitHub
>> > "database" could work very well. The project could be hooked up to
>> > ReadTheDocs and folk would just commit their .rst and .md files.
>> > Preparatory work would go around defining the templates to submit
>> > projections, data and systems.
>> >
>> > Who wants to join? I will create a group at GitHub and get this going in
>> > the coming days.
>> >
>> > Cheers,
>> >
>> > Luís
>> >
>> >
>> > -------- Original Message --------
>> > Subject: Re: [OSGeo-Discuss] Detect and define the coordinate system of
>> > gis data with no projection information automatically
>> > Local Time: 29 August 2016 11:03 PM
>> > UTC Time: 29 August 2016 21:03
>> > From: moquet.julien at gmail.com
>> > To: manfred at egger-gis.at
>> > luis.de.sousa at protonmail.ch,discuss at lists.osgeo.org
>> >
>> > Hi all,
>> >
>> > I am agree with manfred and Luis : we can improve spatial reference
>> data a
>> > lot !
>> > It is a good idea to extend it to mathematical definitions, but its
>> sounds
>> > like a wiki.
>> > I propose to start checking up wikipedia's data over projection
>> references
>> > and mathematical models, up to the proj4's communities (I mean using the
>> > projection issues from them). It is costless, easy to share and manage,
>> and
>> > may be we can get feed back faster than emailing epsg group !
>> > And I guess, lot of people do so !
>> >
>> > On the other hand, I learn from proj4php, that a github project could
>> be a
>> > good database.
>> > As many of us see things differently, they will fork it their way.
>> > What do you think of ?
>> > I will tell if it is working, on spatialreference mailing list.
>> >
>> > Julien2512,
>> >
>> > 2016-08-29 14:45 GMT+02:00 manfred at egger-gis.at <manfred at egger-gis.at>:
>> >
>> >> Dear Luis,
>> >>
>> >> Which concrete detail is not clear about the projection finder project?
>> >>
>> >> Maybe a look at the testservice of Aaron will help to understand this
>> >> idea: www.projfinder.com ?
>> >>
>> >> Best regards,
>> >>
>> >> Manfred
>> >>
>> >> -----Original Message-----
>> >> From: "Luí­s de Sousa" <luis.de.sousa at protonmail.ch>
>> >> Sent: Sunday, August 28, 2016 2:39pm
>> >> To: "manfred at egger-gis.at" <manfred at egger-gis.at>
>> >> Cc: discuss at lists.osgeo.org
>> >> Subject: Re: [OSGeo-Discuss] Detect and define the coordinate system of
>> >> gis data with no projection information automatically
>> >>
>> >> Dear Manfred,
>> >>
>> >>
>> >> The projection finder project is not entirely clear to me, however, the
>> >> suggestion for a new coordinate system database is indeed pertinent.
>> This
>> >> was referred in other addresses at the conference:
>> spatialreference.org
>> >> has not been maintained for several years; parts of proj4 are not, or
>> >> poorly, maintained.
>> >>
>> >> Besides a reference system database, it would also be quite useful to
>> >> have a projection data base, including mathematical definitions, map
>> >> sketches of their ouput and some clues or guidelines to its
>> implementation
>> >> (e.g. pseudo-code algorithms). This information is today very
>> dispersed in
>> >> the web.
>> >>
>> >> Regards,
>> >>
>> >> Luís
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> -------- Original Message --------
>> >> Subject: [OSGeo-Discuss] Detect and define the coordinate system of gis
>> >> data with no projection information automatically
>> >> Local Time: August 28, 2016 6:05 PM
>> >> UTC Time: August 28, 2016 4:05 PM
>> >> From: manfred at egger-gis.at
>> >> To: discuss at lists.osgeo.org
>> >>
>> >> Hello,
>> >>
>> >> At FOSS4G 2016 in Bonn i talked with Venkatesh Raghavan about my poster
>> >> presentation "SHAPEFILE PROJECTIONFINDER". URL to poster:
>> >> http://www.egger-gis.at/app/download/13175253496/POSTER_EGGE
>> >> R_FOSS4G.pdf?t=1469787116
>> >>
>> >> He recommended to start a discussion in this mailing list about the
>> topic
>> >> mentioned in the mail subject.
>> >>
>> >> I also talked in Bonn with Petr Pridal about http://epsg.io. Some days
>> >> before Bonn i wrote emails to Aaaron Racicot and the mailing list of
>> >> http://spatialrefrence.org.
>> >>
>> >> Please read first carefully on my website, what i plan to do:
>> >>
>> >> http://www.egger-gis.at/shapefile-projectionfinder/
>> >>
>> >> There are two problems to solve before tools like SHAPEFILE
>> >> PROJECTIONFINDER can be developed as a sustainable solution:
>> >>
>> >> 1. Until today there is no stable free service running like
>> >> www.projfinder.com by Aaron Racicot, which can be used by all
>> developers.
>> >>
>> >> 2. Until today there is no open source database which includes all
>> >> coordinate system with epsg-code and additionally user and esri
>> definded
>> >> grids.
>> >>
>> >> There are open source solutions like:
>> >>
>> >> - spatialrefrence.org
>> >> - epsg.io
>> >>
>> >> But in the detail both solutions have problems to update their database
>> >> with low costs.
>> >>
>> >> Maybe OSGeo can promote a stable service with load balancing on the
>> base
>> >> of an existing solution like epsg.io including Aarons idea?
>> >>
>> >> Maybe organisation like UN, a university or EU (INTERREG) are possible
>> >> project partners/sponsors for such a solution?
>> >>
>> >> The goal is: Tools like SHAPEFILE PROJECTIONFINDER, a Q-GIS-Plugin or a
>> >> mobile application can use a stable free gis-service updated daily and
>> help
>> >> gis users to solve projection troubles faster. I think gis users
>> working
>> >> not everyday with gis will be happy about this solutions?
>> >>
>> >> What do you think about my idea?
>> >>
>> >> Best regards,
>> >>
>> >> Manfred Egger
>> >>
>> >> Alois-Schrott-Str. 34
>> >> 6020 Innsbruck
>> >> Austria
>> >>
>> >> Web: http://egger-gis.at
>> >>
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>> >>
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>> >>
>> >
>> >
>>
>>
>>
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