OSGeo - User contributions [en]

Developing Geospatial Solutions using Open Source

2006-12-13T17:56:17Z

Wiki-Gagravarr: /* Projection-Conversion */

This is one of the three books identified by the [[Education Committee Work Program|Education and Curriculum Committee]] that should be written. The other books are [[Using Open Source GIS]] and [[Developing Web Mapping Solutions Using Open Source]].

== Approach for writing this book ==

Using the application and programming language categories from http://freegis.org we'll gather problems or use cases, maybe divide them into subproblems, and describe how they can be solved using the free tools.

The tools are [[Programming Languages Project|programming languages]], libraries, command line tools, and customizable applications.

This book is about "I know which problem I need to solve and it can't be solved, at least easily or without trouble, by simply using some free GIS tool".

We exclude web mapping problems from this one since it is the topic of book 3.

Provide here an analysis of the meta problem description above.

Copy the categories and

programming languages: C, C++, Java, Python, Tcl/Tk, Perl, (Visual) Basic, PHP, C#, Fortran, Delphi, Ruby, SWF, Other (Other has zero entries in freegis.org).

== GPS related ==

*Problem: Share GPS data between applications
**Subproblem: Parse GPX
**Explanation: GPX is an XML application for GPS data. Parsing gives us the GPS data.

*Problem:
**Subproblem: GeoTag Media
**Explanation:

*Problem:
**Subproblem: Track logs
**Explanation:

*Problem: Edit a GPS track
**[http://users.skynet.be/watermael/gps/50358.html#to_Moissac example data]
**Requirements: Show the track on a map as editable lines, show the coordinates on a spreadsheet allowing edits, link the two representations
**Subproblem: Import the GPS track to the editor
**Subproblem: Export the track from the system

*Problem: Merge GPS tracks
**Explanation: Allow you to view several GPS traces, delete certain points, and average others together.
**Use: You survey a route several times, and want a single trace of the best average over the traces

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python || Shell
|-
| Parse GPX
| [http://www.topografix.com/gpx.asp What is GPX?]
| [http://search.cpan.org/~rbow/Geo-Cache/lib/Geo/Gpx.pm Perl based solution]
| [http://www.tom-carden.co.uk/googlegpx/upload-gpx Ruby based solution]
| [http://cheeseshop.python.org/pypi/pygpx/ PyGPX]
| [http://mpa.itc.it/markus/useful/shp2gpx.sh shp2gpx.sh] and [http://mpa.itc.it/markus/useful/gpx2shp.sh gpx2shp.sh](scripts calling 'gpsbabel')
|-
| GeoTag Media
|
| [http://rdfweb.org/people/danbri/media/bin/geoloc_media.pl RDFWeb geoloc_media.pl] ([http://locative.us/photomap/geoloc_media.pl original geoloc_media])
| Ruby?
| Python?
| Shell?
|-
| Track logs
|
| [http://search.cpan.org/~rgibson/Geo-Track-Log-0.02/lib/Geo/Track/Log.pm Geo::Track::Log]
| Ruby
| Python
| Shell?
|-
| Track merge
|
|
| Ruby?
| Python?
| gpsbabel can perform related [http://www.gpsbabel.org/htmldoc-1.3.0/Data_Filters.html GPS track operations]
|}

== Projection-Conversion ==
* Problem: Convert between WGS84 and local projections
* Problem: Convert from lat+long to easting and northing, as used on printed maps

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python || Java || JavaScript || Shell
|-
| Change between projections
| Perform a Helmert Transform
| [https://secure.mysociety.org/cvstrac/dir?d=mysociety/perllib/Geo MySociety Code]
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
| [http://www.jstott.me.uk/jcoord/ Jcoord]
| [http://www.jstott.me.uk/jscoord/ JScoord]
| [http://proj.maptools.org/ cs2cs tool]
|-
| Convert from lat+long to easting+northing
|
| [http://search.cpan.org/~toby/Geo-Coordinates-OSGB-1.07/lib/Geo/Coordinates/OSGB.pm Geo::Coordinates::OSGB]
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
| [http://www.jstott.me.uk/jcoord/ Jcoord]
| [http://www.jstott.me.uk/jscoord/ JScoord]
| [http://proj.maptools.org/ cs2cs tool]
|-
| Work with old maps / data in Cassini Projection
| Convert between Cassini and its base elipsoid
|
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
|
| [http://www.ponies.me.uk/maps/cassini/ cassini-coord.js]
|
|}

== GPS and EXIF ==
* Problem: Extract GPS exif tags from photos
* Problem: Add GPS exif tags at the time a photo is taken
* Problem: Add GPS exit tags to photos, based on the time they were taken and a GPS track

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Get GPS EXIF data
| Extract lat and long from GPS Exif tags
|
|
| [http://www.benno.id.au/code/pexif/ pexif]
|-
| Set GPS EXIF date
| Add lat and long GPS Exif tags
|
|
| [http://www.benno.id.au/code/pexif/ pexif]
|}

Developing Geospatial Solutions using Open Source

2006-10-19T09:15:56Z

Wiki-Gagravarr: Projection-Conversion - more code

This is one of the three books identified by the [[Education Committee Work Program|Education and Curriculum Committee]] that should be written. The other books are [[Using Open Source GIS]] and [[Developing Web Mapping Solutions Using Open Source]].

== Approach for writing this book ==

Using the application and programming language categories from http://freegis.org we'll gather problems or use cases, maybe divide them into subproblems, and describe how they can be solved using the free tools.

The tools are [[Programming Languages Project|programming languages]], libraries, command line tools, and customizable applications.

This book is about "I know which problem I need to solve and it can't be solved, at least easily or without trouble, by simply using some free GIS tool".

We exclude web mapping problems from this one since it is the topic of book 3.

Provide here an analysis of the meta problem description above.

Copy the categories and

programming languages: C, C++, Java, Python, Tcl/Tk, Perl, (Visual) Basic, PHP, C#, Fortran, Delphi, Ruby, SWF, Other (Other has zero entries in freegis.org).

== GPS related ==

*Problem: Share GPS data between applications
**Subproblem: Parse GPX
**Explanation: GPX is an XML application for GPS data. Parsing gives us the GPS data.

*Problem:
**Subproblem: GeoTag Media
**Explanation:

*Problem:
**Subproblem: Track logs
**Explanation:

*Problem: Edit a GPS track
**[http://users.skynet.be/watermael/gps/50358.html#to_Moissac example data]
**Requirements: Show the track on a map as editable lines, show the coordinates on a spreadsheet allowing edits, link the two representations
**Subproblem: Import the GPS track to the editor
**Subproblem: Export the track from the system

*Problem: Merge GPS tracks
**Explanation: Allow you to view several GPS traces, delete certain points, and average others together.
**Use: You survey a route several times, and want a single trace of the best average over the traces

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Parse GPX
| [http://www.topografix.com/gpx.asp What is GPX?]
| [http://search.cpan.org/~rbow/Geo-Cache/lib/Geo/Gpx.pm Perl based solution]
| [http://www.tom-carden.co.uk/googlegpx/upload-gpx Ruby based solution]
| [http://cheeseshop.python.org/pypi/pygpx/ PyGPX]
|-
| GeoTag Media
|
| [http://rdfweb.org/people/danbri/media/bin/geoloc_media.pl RDFWeb geoloc_media.pl] ([http://locative.us/photomap/geoloc_media.pl original geoloc_media])
| Ruby?
| Python?
|-
| Track logs
|
| [http://search.cpan.org/~rgibson/Geo-Track-Log-0.02/lib/Geo/Track/Log.pm Geo::Track::Log]
| Ruby
| Python
|}

== Projection-Conversion ==
* Problem: Convert between WGS84 and local projections
* Problem: Convert from lat+long to easting and northing, as used on printed maps

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python || Java || JavaScript
|-
| Change between projections
| Perform a Helmert Transform
| [https://secure.mysociety.org/cvstrac/dir?d=mysociety/perllib/Geo MySociety Code]
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
| [http://www.jstott.me.uk/jcoord/ Jcoord]
| [http://www.jstott.me.uk/jscoord/ JScoord]
|-
| Convert from lat+long to easting+northing
|
| [http://search.cpan.org/~toby/Geo-Coordinates-OSGB-1.07/lib/Geo/Coordinates/OSGB.pm Geo::Coordinates::OSGB]
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
| [http://www.jstott.me.uk/jcoord/ Jcoord]
| [http://www.jstott.me.uk/jscoord/ JScoord]
|}

== GPS and EXIF ==
* Problem: Extract GPS exif tags from photos
* Problem: Add GPS exif tags at the time a photo is taken
* Problem: Add GPS exit tags to photos, based on the time they were taken and a GPS track

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Get GPS EXIF data
| Extract lat and long from GPS Exif tags
|
|
| [http://www.benno.id.au/code/pexif/ pexif]
|-
| Set GPS EXIF date
| Add lat and long GPS Exif tags
|
|
| [http://www.benno.id.au/code/pexif/ pexif]
|}

Developing Geospatial Solutions using Open Source

2006-10-19T09:11:00Z

Wiki-Gagravarr: GPS related - merge traces

This is one of the three books identified by the [[Education Committee Work Program|Education and Curriculum Committee]] that should be written. The other books are [[Using Open Source GIS]] and [[Developing Web Mapping Solutions Using Open Source]].

== Approach for writing this book ==

Using the application and programming language categories from http://freegis.org we'll gather problems or use cases, maybe divide them into subproblems, and describe how they can be solved using the free tools.

The tools are [[Programming Languages Project|programming languages]], libraries, command line tools, and customizable applications.

This book is about "I know which problem I need to solve and it can't be solved, at least easily or without trouble, by simply using some free GIS tool".

We exclude web mapping problems from this one since it is the topic of book 3.

Provide here an analysis of the meta problem description above.

Copy the categories and

programming languages: C, C++, Java, Python, Tcl/Tk, Perl, (Visual) Basic, PHP, C#, Fortran, Delphi, Ruby, SWF, Other (Other has zero entries in freegis.org).

== GPS related ==

*Problem: Share GPS data between applications
**Subproblem: Parse GPX
**Explanation: GPX is an XML application for GPS data. Parsing gives us the GPS data.

*Problem:
**Subproblem: GeoTag Media
**Explanation:

*Problem:
**Subproblem: Track logs
**Explanation:

*Problem: Edit a GPS track
**[http://users.skynet.be/watermael/gps/50358.html#to_Moissac example data]
**Requirements: Show the track on a map as editable lines, show the coordinates on a spreadsheet allowing edits, link the two representations
**Subproblem: Import the GPS track to the editor
**Subproblem: Export the track from the system

*Problem: Merge GPS tracks
**Explanation: Allow you to view several GPS traces, delete certain points, and average others together.
**Use: You survey a route several times, and want a single trace of the best average over the traces

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Parse GPX
| [http://www.topografix.com/gpx.asp What is GPX?]
| [http://search.cpan.org/~rbow/Geo-Cache/lib/Geo/Gpx.pm Perl based solution]
| [http://www.tom-carden.co.uk/googlegpx/upload-gpx Ruby based solution]
| [http://cheeseshop.python.org/pypi/pygpx/ PyGPX]
|-
| GeoTag Media
|
| [http://rdfweb.org/people/danbri/media/bin/geoloc_media.pl RDFWeb geoloc_media.pl] ([http://locative.us/photomap/geoloc_media.pl original geoloc_media])
| Ruby?
| Python?
|-
| Track logs
|
| [http://search.cpan.org/~rgibson/Geo-Track-Log-0.02/lib/Geo/Track/Log.pm Geo::Track::Log]
| Ruby
| Python
|}

== Projection-Conversion ==
* Problem: Convert between WGS84 and local projections
* Problem: Convert from lat+long to easting and northing, as used on printed maps

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Change between projections
|
| [https://secure.mysociety.org/cvstrac/dir?d=mysociety/perllib/Geo MySociety Code]
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
|-
| Convert from lat+long to easting+northing
|
|
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
|}

== GPS and EXIF ==
* Problem: Extract GPS exif tags from photos
* Problem: Add GPS exif tags at the time a photo is taken
* Problem: Add GPS exit tags to photos, based on the time they were taken and a GPS track

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Get GPS EXIF data
| Extract lat and long from GPS Exif tags
|
|
| [http://www.benno.id.au/code/pexif/ pexif]
|-
| Set GPS EXIF date
| Add lat and long GPS Exif tags
|
|
| [http://www.benno.id.au/code/pexif/ pexif]
|}

Developing Geospatial Solutions using Open Source

2006-10-03T11:28:34Z

Wiki-Gagravarr: GPS+Exif

This is one of the three books identified by the [[Education Committee Work Program|Education and Curriculum Committee]] that should be written. The other books are [[Using Open Source GIS]] and [[Developing Web Mapping Solutions Using Open Source]].

== Approach for writing this book ==

Using the application and programming language categories from http://freegis.org we'll gather problems or use cases, maybe divide them into subproblems, and describe how they can be solved using the free tools.

The tools are [[Programming Languages Project|programming languages]], libraries, command line tools, and customizable applications.

This book is about "I know which problem I need to solve and it can't be solved, at least easily or without trouble, by simply using some free GIS tool".

We exclude web mapping problems from this one since it is the topic of book 3.

Provide here an analysis of the meta problem description above.

Copy the categories and

programming languages: C, C++, Java, Python, Tcl/Tk, Perl, (Visual) Basic, PHP, C#, Fortran, Delphi, Ruby, SWF, Other (Other has zero entries in freegis.org).

== GPS related ==

*Problem: Share GPS data between applications
**Subproblem: Parse GPX
**Explanation: GPX is an XML application for GPS data. Parsing gives us the GPS data.

*Problem:
**Subproblem: GeoTag Media
**Explanation:

*Problem:
**Subproblem: Track logs
**Explanation:

*Problem: Edit a GPS track
**[http://users.skynet.be/watermael/gps/50358.html#to_Moissac example data]
**Requirements: Show the track on a map as editable lines, show the coordinates on a spreadsheet allowing edits, link the two representations
**Subproblem: Import the GPS track to the editor
**Subproblem: Export the track from the system

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Parse GPX
| [http://www.topografix.com/gpx.asp What is GPX?]
| [http://search.cpan.org/~rbow/Geo-Cache/lib/Geo/Gpx.pm Perl based solution]
| [http://www.tom-carden.co.uk/googlegpx/upload-gpx Ruby based solution]
| [http://cheeseshop.python.org/pypi/pygpx/ PyGPX]
|-
| GeoTag Media
|
| [http://rdfweb.org/people/danbri/media/bin/geoloc_media.pl RDFWeb geoloc_media.pl] ([http://locative.us/photomap/geoloc_media.pl original geoloc_media])
| Ruby?
| Python?
|-
| Track logs
|
| [http://search.cpan.org/~rgibson/Geo-Track-Log-0.02/lib/Geo/Track/Log.pm Geo::Track::Log]
| Ruby
| Python
|}

== Projection-Conversion ==
* Problem: Convert between WGS84 and local projections
* Problem: Convert from lat+long to easting and northing, as used on printed maps

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Change between projections
|
| [https://secure.mysociety.org/cvstrac/dir?d=mysociety/perllib/Geo MySociety Code]
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
|-
| Convert from lat+long to easting+northing
|
|
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
|}

== GPS and EXIF ==
* Problem: Extract GPS exif tags from photos
* Problem: Add GPS exif tags at the time a photo is taken
* Problem: Add GPS exit tags to photos, based on the time they were taken and a GPS track

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Get GPS EXIF data
| Extract lat and long from GPS Exif tags
|
|
| [http://www.benno.id.au/code/pexif/ pexif]
|-
| Set GPS EXIF date
| Add lat and long GPS Exif tags
|
|
| [http://www.benno.id.au/code/pexif/ pexif]
|}

United Kingdom

2006-09-24T22:21:32Z

Wiki-Gagravarr: /* People */

== Mission ==

'''The beginnings of a manifesto (edit as you see fit):'''
* To provide a UK-specific focus for the OSGEO and to arrange UK meetings
* To help UK organisations discover the opportunity of open source geospatial tools
* To work towards a fully featured [[UK SDI]]
* To provide a starting point for people from the UK who are new to the Open Source Geospatial movement
* To provide a focus for lobbying for public access to UK Geodata
* To, maybe, one day, act as focal point for the UK organising the FOSS4G conference

----
'''Don't forget to sign the Inspire petition -and tell your friends too - you don't have to use geo-data to believe that publically funded work should be public property! http://petition.publicgeodata.org/
----

[[Useful Links UK]]

== People ==

Sign up here to show interest!

[[User:Chrisputtick]]

Yes, definitely worth doing

[[User:JoCook]]

woohoo!
[[User:Leifuss]]

[[User:Stuarteve]]

+1

[[User:JoWalsh]]

[[User:andyt]]

[[User:Davidjlock]]

Excellent! All for this!! - [[User:Simon]]

uh huh [[User:Graeme]]

[[User:SteveW]]

[[User::andrewlarcombe]]

[[User:Gagravarr]] - involved in OpenGuides and OpenStreetMap in the UK

== Meetings ==

=== Related ===

Tuesday September, 26th: Steve Coast of OpenStreetmap fame is giving a talk to the BCS entitled Geospatial Open Source Activity. Details at [http://geospatial.bcs.org/site/index.php?s=future-events#3 http://geospatial.bcs.org/site/index.php?s=future-events#3]

The UK-originated [http://openguides.org/ OpenGuides] Open Source spatial wiki project is having a pub meetup and "hackfest" on the 8th-10th December also in Oxford - http://dev.openguides.org/wiki/OxfordMeetup2006
: There will be a few OpenStreetMap people at this event too (there's a fair degree of overlap). Crash space is available, and nice pubs will be visited!

[http://openstreetmap.org/ OpenStreetmap] also have regular UK mapping parties in different cities and it could be a lot of fun to sync an OSGeo-UK meetup with an OSM mapping party.
: OpenStreetmMap agrees :)

User:Gagravarr

2006-09-24T22:21:22Z

Wiki-Gagravarr: About me

I'm Nick Burch, and I'm based in [http://wiki.openstreetmap.org/index.php/Oxford Oxford].

I'm involved in [http://www.openstreetmap.org/ OpenStreetMap] and [http://www.openguides.org/ OpenGuides]

United Kingdom

2006-09-24T22:16:47Z

Wiki-Gagravarr: Related - meeting other groups is good

== Mission ==

'''The beginnings of a manifesto (edit as you see fit):'''
* To provide a UK-specific focus for the OSGEO and to arrange UK meetings
* To help UK organisations discover the opportunity of open source geospatial tools
* To work towards a fully featured [[UK SDI]]
* To provide a starting point for people from the UK who are new to the Open Source Geospatial movement
* To provide a focus for lobbying for public access to UK Geodata
* To, maybe, one day, act as focal point for the UK organising the FOSS4G conference

----
'''Don't forget to sign the Inspire petition -and tell your friends too - you don't have to use geo-data to believe that publically funded work should be public property! http://petition.publicgeodata.org/
----

[[Useful Links UK]]

== People ==

Sign up here to show interest!

[[User:Chrisputtick]]

Yes, definitely worth doing

[[User:JoCook]]

woohoo!
[[User:Leifuss]]

[[User:Stuarteve]]

+1

[[User:JoWalsh]]

[[User:andyt]]

[[User:Davidjlock]]

Excellent! All for this!! - [[User:Simon]]

uh huh [[User:Graeme]]

[[User:SteveW]]

[[User::andrewlarcombe]]

== Meetings ==

=== Related ===

Tuesday September, 26th: Steve Coast of OpenStreetmap fame is giving a talk to the BCS entitled Geospatial Open Source Activity. Details at [http://geospatial.bcs.org/site/index.php?s=future-events#3 http://geospatial.bcs.org/site/index.php?s=future-events#3]

The UK-originated [http://openguides.org/ OpenGuides] Open Source spatial wiki project is having a pub meetup and "hackfest" on the 8th-10th December also in Oxford - http://dev.openguides.org/wiki/OxfordMeetup2006
: There will be a few OpenStreetMap people at this event too (there's a fair degree of overlap). Crash space is available, and nice pubs will be visited!

[http://openstreetmap.org/ OpenStreetmap] also have regular UK mapping parties in different cities and it could be a lot of fun to sync an OSGeo-UK meetup with an OSM mapping party.
: OpenStreetmMap agrees :)

Developing Geospatial Solutions using Open Source

2006-09-01T11:00:25Z

Wiki-Gagravarr: Projection code

This is one of the three books identified by the [[Education and Curriculum Committee#Books and tutorials|Education and Curriculum Committee]] that should be written. The other books are [[Using Open Source GIS]] and [[Developing Web Mapping Solutions Using Open Source]].

== Approach for writing this book ==

Using the application categories from http://freegis.org we'll gather problems or use cases, maybe divide them into subproblems, and describe how they can be solved using the free tools.

The tools are [[Programming Languages Project|programming languages]], libraries, command line tools, and customizable applications.

== GPS related ==

*Problem: Share GPS data between applications
**Subproblem: Parse GPX
**Explanation: GPX is an XML application for GPS data. Parsing gives us the GPS data.

*Problem:
**Subproblem: GeoTag Media
**Explanation:

*Problem:
**Subproblem: Track logs
**Explanation:

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Parse GPX
| [http://www.topografix.com/gpx.asp What is GPX?]
| [http://search.cpan.org/~rbow/Geo-Cache/lib/Geo/Gpx.pm Perl based solution]
| [http://www.tom-carden.co.uk/googlegpx/upload-gpx Ruby based solution]
| [http://cheeseshop.python.org/pypi/pygpx/ PyGPX]
|-
| GeoTag Media
|
| [http://rdfweb.org/people/danbri/media/bin/geoloc_media.pl RDFWeb geoloc_media.pl] ([http://locative.us/photomap/geoloc_media.pl original geoloc_media])
| Ruby?
| Python?
|-
| Track logs
|
| [http://search.cpan.org/~rgibson/Geo-Track-Log-0.02/lib/Geo/Track/Log.pm Geo::Track::Log]
| Ruby
| Python
|}

== Projection-Conversion ==
* Problem: Convert between WGS84 and local projections
* Problem: Convert from lat+long to easting and northing, as used on printed maps

{| class="wikitable" style="text-align:center" border="1" cellpadding="2"
| Use case || Description || Perl || Ruby || Python
|-
| Change between projections
|
| [https://secure.mysociety.org/cvstrac/dir?d=mysociety/perllib/Geo MySociety Code]
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
|-
| Convert from lat+long to easting+northing
|
|
|
| [http://gagravarr.org/code/#geo_helper geo_helper.py]
|}