Define spatial reference system for local datum
|
View:
New views
9 Messages
—
Rating Filter:
Alert me
|
 |
Define spatial reference system for local datum
by tommy408
::
Rate this Message:
I don't need special projection. My map is a flat plane so I'm trying to use local datum as my srs because a bunch of gis map design tool ask for it.
So I'm trying to add a new srs into postgis spatial_ref_sys table with the following srstext LOCAL_CS["Non-Earth (Meter)",LOCAL_DATUM["Local Datum",0],UNIT["Meter", 1],AXIS["X",EAST],AXIS["Y",NORTH]] What do I put for proj4text? |
|
|
Re: Define spatial reference system for local datum
by Suhr, Ralf
::
Rate this Message:
Do not use a local system. For everything larger than 200meters you need a srs definition, because you can't messure it exactly.
Take a projection from your living area und shift your geometrys to the right place. -----Ursprüngliche Nachricht----- Von: postgis-users-bounces@... [mailto:postgis-users-bounces@...] Im Auftrag von tommy408 Gesendet: Dienstag, 30. Juni 2009 12:26 An: postgis-users@... Betreff: [postgis-users] Define spatial reference system for local datum I don't need special projection. My map is a flat plane so I'm trying to use local datum as my srs because a bunch of gis map design tool ask for it. So I'm trying to add a new srs into postgis spatial_ref_sys table with the following srstext LOCAL_CS["Non-Earth (Meter)",LOCAL_DATUM["Local Datum",0],UNIT["Meter", 1],AXIS["X",EAST],AXIS["Y",NORTH]] What do I put for proj4text? -- View this message in context: http://www.nabble.com/Define-spatial-reference-system-for-local-datum-tp24269524p24269524.html Sent from the PostGIS - User mailing list archive at Nabble.com. _______________________________________________ postgis-users mailing list postgis-users@... http://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ postgis-users mailing list postgis-users@... http://postgis.refractions.net/mailman/listinfo/postgis-users |
|
|
Re: Define spatial reference system for local datum
by tommy408
::
Rate this Message:
I'm not mapping anything on earth. The world I'm doing is flat. The polygons I'm drawing over is raster image I made. So I'm trying not to use any ellipsoid projection.
|
|
|
Re: Define spatial reference system for local datum
by Sean Fulton
::
Rate this Message:
Can you just set the SRID to -1. What 'map design tool' are you
using? Sean On Jun 30, 3:00 pm, tommy408 <tommytomo...@...> wrote: > I'm not mapping anything on earth. The world I'm doing is flat. The > polygons I'm drawing over is raster image I made. So I'm trying not to use > any ellipsoid projection. > > > > Suhr, Ralf wrote: > > > Do not use a local system. For everything larger than 200meters you need a > > srs definition, because you can't messure it exactly. > > > Take a projection from your living area und shift your geometrys to the > > right place. > > > -----Ursprüngliche Nachricht----- > > Von: postgis-users-boun...@... > > [mailto:postgis-users-boun...@...] Im Auftrag von > > tommy408 > > Gesendet: Dienstag, 30. Juni 2009 12:26 > > An: postgis-us...@... > > Betreff: [postgis-users] Define spatial reference system for local datum > > > I don't need special projection. My map is a flat plane so I'm trying to > > use local datum as my srs because a bunch of gis map design tool ask for > > it. > > > So I'm trying to add a new srs into postgis spatial_ref_sys table with the > > following srstext > > > LOCAL_CS["Non-Earth (Meter)",LOCAL_DATUM["Local Datum",0],UNIT["Meter", > > 1],AXIS["X",EAST],AXIS["Y",NORTH]] > > > What do I put for proj4text? > > -- > > View this message in context: > >http://www.nabble.com/Define-spatial-reference-system-for-local-datum... > > Sent from the PostGIS - User mailing list archive at Nabble.com. > > > _______________________________________________ > > postgis-users mailing list postgis-us...@... > >http://postgis.refractions.net/mailman/listinfo/postgis-users > > _______________________________________________ > > postgis-users mailing list > > postgis-us...@... > >http://postgis.refractions.net/mailman/listinfo/postgis-users > > -- > View this message in context:http://www.nabble.com/Define-spatial-reference-system-for-local-datum... > Sent from the PostGIS - User mailing list archive at Nabble.com. > > _______________________________________________ > postgis-users mailing list > postgis-us...@...://postgis.refractions.net/mailman/listinfo/postgis-users postgis-users mailing list postgis-users@... http://postgis.refractions.net/mailman/listinfo/postgis-users |
|
|
Re: Define spatial reference system for local datum
by tommy408
::
Rate this Message:
A lot of these tools that connect to postigs db requires a srid. I was trying out Udig. I don't need to use these tools. I can just work with shapefile and import it to postgis.
But what I'm worry about is if I use a defined srid like EPSG:4326 and my personal map coordinates will mess up because of the projection. The world I'm mapping is flat and endless, it doesn't wrap around like earth map.
|
|
|
Re: Define spatial reference system for local datum
by Sean Fulton
::
Rate this Message:
I'm not sure why you want to assign it an SRS of EPSG:4326.
uDig will load and Quantum GIS will happily load and edit the layers if you assign an SRID of -1. Sean On 2009-07-01 16:36:44 -0400, tommy408 <tommytomorow@...> said: > > A lot of these tools that connect to postigs db requires a srid. I was > trying out Udig. I don't need to use these tools. I can just work with > shapefile and import it to postgis. > > But what I'm worry about is if I use a defined srid like EPSG:4326 and my > personal map coordinates will mess up because of the projection. The world > I'm mapping is flat and endless, it doesn't wrap around like earth map. > > > > > Sean Fulton wrote: >> >> Can you just set the SRID to -1. What 'map design tool' are you >> using? >> >> Sean >> >> On Jun 30, 3:00 pm, tommy408 <tommytomo...@...> wrote: >>> I'm not mapping anything on earth. The world I'm doing is flat. The >>> polygons I'm drawing over is raster image I made. So I'm trying not to >>> use >>> any ellipsoid projection. >>> >>> >>> >>> Suhr, Ralf wrote: >>> >>>> Do not use a local system. For everything larger than 200meters you >>> need a >>>> srs definition, because you can't messure it exactly. >>> >>>> Take a projection from your living area und shift your geometrys to the >>>> right place. >>> >>>> -----Ursprüngliche Nachricht----- >>>> Von: postgis-users-boun...@... >>>> [mailto:postgis-users-boun...@...] Im Auftrag von >>>> tommy408 >>>> Gesendet: Dienstag, 30. Juni 2009 12:26 >>>> An: postgis-us...@... >>>> Betreff: [postgis-users] Define spatial reference system for local >>> datum >>> >>>> I don't need special projection. My map is a flat plane so I'm trying >>> to >>>> use local datum as my srs because a bunch of gis map design tool ask >>> for >>>> it. >>> >>>> So I'm trying to add a new srs into postgis spatial_ref_sys table with >>> the >>>> following srstext >>> >>>> LOCAL_CS["Non-Earth (Meter)",LOCAL_DATUM["Local Datum",0],UNIT["Meter", >>>> 1],AXIS["X",EAST],AXIS["Y",NORTH]] >>> >>>> What do I put for proj4text? >>>> -- >>>> View this message in context: >>>> http://www.nabble.com/Define-spatial-reference-system-for-local-datum... >>>> Sent from the PostGIS - User mailing list archive at Nabble.com. >>> >>>> _______________________________________________ >>>> postgis-users mailing list postgis-us...@... >>>> http://postgis.refractions.net/mailman/listinfo/postgis-users >>>> _______________________________________________ >>>> postgis-users mailing list >>>> postgis-us...@... >>>> http://postgis.refractions.net/mailman/listinfo/postgis-users >>> >>> -- >>> View this message in >>> context:http://www.nabble.com/Define-spatial-reference-system-for-local-datum... >>> >>> from the PostGIS - User mailing list archive at Nabble.com. >>> >>> _______________________________________________ >>> postgis-users mailing list >>> postgis-us...@...://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ postgis-users >>> >> mailing list >> postgis-users@... >> http://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ postgis-users mailing list postgis-users@... http://postgis.refractions.net/mailman/listinfo/postgis-users |
|
|
Re: Define spatial reference system for local datum
by tommy408
::
Rate this Message:
Thank you for your help Sean and Ralf.
When I load polygon table with srid of -1, Udig keeps saying undefined spatial reference...unexpected behavior might occur...etc. And when I try to edit the layer, the layer constantly flashing and Udig crashes.
|
|
|
Re: Define spatial reference system for local datum
by Sean Fulton
::
Rate this Message:
Like, I said uDig will load the layer. Quantum GIS with load and edit it.
Try Quantum GIS http://www.qgis.org/en/download.html Sean On 2009-07-05 04:53:54 -0400, tommy408 <tommytomorow@...> said: > > Thank you for your help Sean and Ralf. > > When I load polygon table with srid of -1, Udig keeps saying undefined > spatial reference...unexpected behavior might occur...etc. And when I try > to edit the layer, the layer constantly flashing and Udig crashes. > > > > Sean Fulton wrote: >> >> I'm not sure why you want to assign it an SRS of EPSG:4326. >> >> uDig will load and Quantum GIS will happily load and edit the layers if >> you assign an SRID of -1. >> >> >> Sean >> >> >> On 2009-07-01 16:36:44 -0400, tommy408 <tommytomorow@...> said: >> >>> >>> A lot of these tools that connect to postigs db requires a srid. I was >>> trying out Udig. I don't need to use these tools. I can just work with >>> shapefile and import it to postgis. >>> >>> But what I'm worry about is if I use a defined srid like EPSG:4326 and my >>> personal map coordinates will mess up because of the projection. The >>> world >>> I'm mapping is flat and endless, it doesn't wrap around like earth map. >>> >>> >>> >>> >>> Sean Fulton wrote: >>>> >>>> Can you just set the SRID to -1. What 'map design tool' are you >>>> using? >>>> >>>> Sean >>>> >>>> On Jun 30, 3:00 pm, tommy408 <tommytomo...@...> wrote: >>>>> I'm not mapping anything on earth. The world I'm doing is flat. The >>>>> polygons I'm drawing over is raster image I made. So I'm trying not to >>>>> use >>>>> any ellipsoid projection. >>>>> >>>>> >>>>> >>>>> Suhr, Ralf wrote: >>>>> >>>>>> Do not use a local system. For everything larger than 200meters you >>>>> need a >>>>>> srs definition, because you can't messure it exactly. >>>>> >>>>>> Take a projection from your living area und shift your geometrys to >>>>>> the >>>>>> right place. >>>>> >>>>>> -----Ursprüngliche Nachricht----- >>>>>> Von: postgis-users-boun...@... >>>>>> [mailto:postgis-users-boun...@...] Im Auftrag von >>>>>> tommy408 >>>>>> Gesendet: Dienstag, 30. Juni 2009 12:26 >>>>>> An: postgis-us...@... >>>>>> Betreff: [postgis-users] Define spatial reference system for local >>>>> datum >>>>> >>>>>> I don't need special projection. My map is a flat plane so I'm trying >>>>> to >>>>>> use local datum as my srs because a bunch of gis map design tool ask >>>>> for >>>>>> it. >>>>> >>>>>> So I'm trying to add a new srs into postgis spatial_ref_sys table with >>>>> the >>>>>> following srstext >>>>> >>>>>> LOCAL_CS["Non-Earth (Meter)",LOCAL_DATUM["Local >>>>>> Datum",0],UNIT["Meter", >>>>>> 1],AXIS["X",EAST],AXIS["Y",NORTH]] >>>>> >>>>>> What do I put for proj4text? >>>>>> -- >>>>>> View this message in context: >>>>>> http://www.nabble.com/Define-spatial-reference-system-for-local-datum... >>>>>> Sent from the PostGIS - User mailing list archive at Nabble.com. >>>>> >>>>>> _______________________________________________ >>>>>> postgis-users mailing list postgis-us...@... >>>>>> http://postgis.refractions.net/mailman/listinfo/postgis-users >>>>>> _______________________________________________ >>>>>> postgis-users mailing list >>>>>> postgis-us...@... >>>>>> http://postgis.refractions.net/mailman/listinfo/postgis-users >>>>> >>>>> -- >>>>> View this message in >>>>> context:http://www.nabble.com/Define-spatial-reference-system-for-local-datum... from >>>>> >>>>> the PostGIS - User mailing list archive at Nabble.com. >>>>> >>>>> _______________________________________________ >>>>> postgis-users mailing list >>>>> postgis-us...@...://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ postgis-users mailing >>>>> >>>> list >>>> postgis-users@... >>>> http://postgis.refractions.net/mailman/listinfo/postgis-users >> >> >> >> _______________________________________________ >> postgis-users mailing list >> postgis-users@... >> http://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ postgis-users mailing list postgis-users@... http://postgis.refractions.net/mailman/listinfo/postgis-users |
|
|
GISVM Server pre-release available
by Ricardo Pinho
::
Rate this Message:
Dear all, The first public pre-release version of “GIS Virtual Machine Server” is available at: http://gisvm.com GISVM Server is another product based on the GISVM new concept for a Free Open Source GIS Software distribution. With it you get a full feature Free (dom) GIS Server, ready to use with your favorite GIS desktop application! GISVM Server includes: - Ubuntu 9.04 Server Edition JeOS (Just enough OS) - LAMP Server bundle (Linux, Apache, MySQL and PHP) - Samba File Server - Tomcat Java Server - PostgreSQL database server - PostGIS (PostgreSQL spatial extension), ZigGIS and FDO ready! - Mapserver - Geoserver - Deegree - Webmin (a web-based interface for GISVM Server administration) If you think this is a useful and interesting product, please help us with your participation on the beta testing forum board: http://gisvm.com/forum/index.php?board=6.0 Thank you for your time and collaboration! Best regards, Ricardo Pinho ____________________________________________________________________________________ Veja quais são os assuntos do momento no Yahoo! +Buscados http://br.maisbuscados.yahoo.com _______________________________________________ postgis-users mailing list postgis-users@... http://postgis.refractions.net/mailman/listinfo/postgis-users |
| Free embeddable forum powered by Nabble | Forum Help |
