ProjNET Forum Rss Feed

New Post: OS Eastings / Northings to Google latlon

sbennetts — Mon, 29 Apr 2013 13:54:20 GMT

Hi

Please could someone post some c# code for the above conversion or point me in the right direction?

Thanks
Simon

New Post: Projection Parsing Error

garfield_lambda — Sat, 16 Feb 2013 19:58:46 GMT

Forgot to say that the parsing error is:

"Expecting (']') but got a ',' at line X column Y

Thanks

New Post: Projection Parsing Error

garfield_lambda — Sat, 16 Feb 2013 19:57:18 GMT

Hello,

I have a problem when parsing the folloing projection:

PROJCS["International_Terrestrial_Reference_Frame_1992Lambert_Conformal_Conic_2SP",
GEOGCS["GCS_International_Terrestrial_Reference_Frame_1992",
DATUM["International_Terrestrial_Reference_Frame_1992",
SPHEROID["GRS_1980",6378137,298.257222101],
TOWGS84[0,0,0,0,0,0,0]],
PRIMEM["Greenwich",0],
UNIT["Degree",0.0174532925199433]],
PROJECTION["Lambert_Conformal_Conic_2SP",AUTHORITY["EPSG","9802"]],
PARAMETER["Central_Meridian",-102],
PARAMETER["Latitude_Of_Origin",12],
PARAMETER["False_Easting",2500000],
PARAMETER["False_Northing",0],
PARAMETER["Standard_Parallel_1",17.5],
PARAMETER["Standard_Parallel_2",29.5],
PARAMETER["Scale_Factor",1],
UNIT["Meter",1,AUTHORITY["EPSG","9001"]]]

The problem is in this line, as I detected:

PROJECTION["Lambert_Conformal_Conic_2SP",AUTHORITY["EPSG","9802"]],

If I change to:

PROJECTION["Lambert_Conformal_Conic_2SP"],

The parsing is succesful.

Because customers of this app can frequently find this or a similar projection which is coming from a .prj file, I need to find how to fix that.

Any clues ?

New Post: Proj.net reprojection problem!

jkara — Sat, 12 Jan 2013 18:08:05 GMT

Did you ever figure this out? I'm running into a similar issue going from UTM 18N to WGS84.

New Post: UTM ED50 to WGS84

jkara — Fri, 11 Jan 2013 18:50:54 GMT

Did you ever solve this? I'm running into a similar issue going from UTM 18N to WGS84.

New Post: Concerned about the accuracy

jkara — Fri, 11 Jan 2013 15:58:46 GMT

I have the exact same issue. WGS84_UTM(18,N) to WGS84:

Input: 307821.867 4219306.387

Proj.Net output: -77.191748384445773 38.100463291796331

The correct answer according to a bunch of different websites and spatialite

spatialite> select astext(st_transform(MakePoint(307821.867, 4219306.387, 32618), 4326));

POINT(-77.191769 38.101147)

This is causing meters worth of inaccuracy.

Jeremy

New Post: Converting UTM GPS data to decimal Lat/Long with datum

Jad3d — Tue, 08 Jan 2013 08:29:45 GMT

Given UTM GPS coordinates :

GPSLatitude 55,00°40,00'56,54"
GPSLatitudeRef North
GPSLongitude 37,00°37,00'41,81"
GPSLongitudeRef East
GPSMapDatum WGS-84

There is a need to convert them to decimal LatLong (X:55.6823722222, Y:37.6282805556) in same datum and to some other like EPSG:900913 in future. Looked into project source (TestUnitTransforms in CoordinateTransformTests, i.e.), but didn't find a way to pass degree/minute/second coordinate to transformation factory. I know simple formulae dd.ff = dd + mm/60 + ss/3600 for that, but reverse conversion is much more complex and i want to have ultimate precision during conversion. Thanks in advance for help.

New Post: Coordinate systems

XDEV01 — Tue, 20 Nov 2012 22:09:02 GMT

G'day this looks like a great tool, I was wondering if it is possible to GCS GDA 94 and the MGA Zones for Australia?

New Post: List all Coordinate Systems

iifuzz — Mon, 22 Oct 2012 15:11:22 GMT

Does anyone have a list or database of all US Coordinate Systems / UTM that I can populate to a list for use with this library?

I am trying to make a silverlight application that will allow the user to go from the selected coordinate system to a Bing Map..

*Edit* I Found the SRID and the entry in the Wiki, I think this will work for me!

New Post: Published a NuGet

D_Guidi — Fri, 21 Sep 2012 19:28:31 GMT

please update nuget page at https://nuget.org/packages/Proj.NET

thanks

New Post: Published a NuGet

D_Guidi — Tue, 11 Sep 2012 12:51:26 GMT

bytenik wrote:
Sure; is there a reason to keep the original though? They're identical
other than the new one has the GeoAPI dep, which makes it more
flexible.

yes, the fact that the original doesn't have any dependency :)

New Post: Published a NuGet

bytenik — Tue, 11 Sep 2012 12:39:49 GMT

Sure; is there a reason to keep the original though? They're identical
other than the new one has the GeoAPI dep, which makes it more
flexible.

On Tue, Sep 11, 2012 at 8:38 AM, [email removed] wrote:
> From: D_Guidi
>
> A side note: since there are two nuget packages
> (https://nuget.org/packages/ProjNet and
> https://nuget.org/packages/Proj.NET), can you edit your nuget page and
> explain better that your nuget is from a fork and what are the differences?
> So the nuget users can understand better what package use.
>
> Read the full discussion online.
>
> To add a post to this discussion, reply to this email
> ([email removed])
>
> To start a new discussion for this project, email
> [email removed]
>
> You are receiving this email because you subscribed to this discussion on
> CodePlex. You can unsubscribe on CodePlex.com.
>
> Please note: Images and attachments will be removed from emails. Any posts
> to this discussion will also be available online at CodePlex.com

New Post: Published a NuGet

D_Guidi — Tue, 11 Sep 2012 12:37:57 GMT

A side note: since there are two nuget packages (https://nuget.org/packages/ProjNet and https://nuget.org/packages/Proj.NET), can you edit your nuget page and explain better that your nuget is from a fork and what are the differences? So the nuget users can understand better what package use.

New Post: Published a NuGet

D_Guidi — Tue, 11 Sep 2012 12:34:37 GMT

Thanks a lot for your effort.

If you have plans to maintain this fork, I can publish the github link on the main page.

Let me know.

New Post: Published a NuGet

bytenik — Tue, 11 Sep 2012 10:51:32 GMT

Hi all,

We're using Proj.Net with NetTopologySuite. Since this version doesn't depend on GeoAPI, they weren't compatible.

I forked the source code onto GitHub at https://github.com/fivepmtechnology/ProjNET, changed the code to depend on GeoAPI, and published a new NuGet package with an ID of Proj.NET instead of ProjNET.

Hope this is helpful for someone.

Thanks!

New Post: How to Convert Cassini Soldner to WGS84?

steelraiden — Mon, 10 Sep 2012 10:33:46 GMT

Ok thank you I solved my problem. Nice libraries!

New Post: How to Convert Cassini Soldner to WGS84?

D_Guidi — Mon, 10 Sep 2012 06:54:16 GMT

cassini projection is not supported. you can try with http://dotspatial.codeplex.com/wikipage?title=DotSpatial.Projections

New Post: How to Convert Cassini Soldner to WGS84?

SteelRaiden — Fri, 07 Sep 2012 12:59:42 GMT

Hi,

I have to convert the Cassini-Soldner coordinate system to WGS84 or Gauss-Boaga.

Here is my code:

Geometry Transfrom(Geometry Geom)

{

CoordinateSystemFactory cf = new CoordinateSystemFactory();

ICoordinateSystem from=cf.CreateFromWkt("PROJCS[\"DHDN / Soldner Berlin\",GEOGCS[\"DHDN\",DATUM[\"D_Deutsches_Hauptdreiecksnetz\",SPHEROID[\"Bessel_1841\",6377397.155,299.1528128]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.017453292519943295]],PROJECTION[\"Cassini\"],PARAMETER[\"latitude_of_origin\",52.41864827777778],PARAMETER[\"central_meridian\",13.62720366666667],PARAMETER[\"false_easting\",40000],PARAMETER[\"false_northing\",10000],UNIT[\"Meter\",1]]");

ICoordinateTransformation t = new CoordinateTransformationFactory().CreateFromCoordinateSystems(from, GeographicCoordinateSystem.WGS84);

return GeometryTransform.TransformGeometry(Geom, t.MathTransform);

}

But I get this error: Cassini is not supported. How can I do?

New Post: Routing on OSF with GeoServer

D_Guidi — Wed, 05 Sep 2012 13:52:23 GMT

looks you've posted in the wrong forum

New Post: Routing on OSF with GeoServer

LadaSt — Wed, 05 Sep 2012 11:19:39 GMT

Hallo, I use GeoServer a data from shp file by OpenStreetMaps. I can't to have connect to Internet. How Can I create routes between two points? Now I use this code in WPF:

List<PointLatLng> points = new List<PointLatLng>();
points.Add(new PointLatLng(49.222979, 17.659786));
points.Add(new PointLatLng(49.223736, 17.66878));
points.Add(new PointLatLng(49.225649, 17.668707));

MapRoute r = GMapProviders.OpenStreetMap.GetRouteBetweenPoints(points[0], points[2], false, false, 15);

GMapMarker route = new GMapMarker(points[0]);
route.Route.AddRange(r.Points);
route.RegenerateRouteShape(this);
route.ZIndex = -1;
this.Markers.Add(route);

This line is problem:
MapRoute r = GMapProviders.OpenStreetMap.GetRouteBetweenPoints(points[0], points[2], false, false, 15); It's only ok, when I connect to Internet.

Can you help me? Thanks. Lada