Visualising a custom map with QGIS and D3.js is harmed by the projection

These are 4 polygons I have: http://imgur.com/vsVjxE1 in QGIS. I now wanted to use them with D3.js. I already tried out the things in QGIS generated shapefile malformed when converted to topojson by mapshaper. That was working well on the old json file. But when I was creating a new one, it was bugging in the vertical middle. That's the example http://jsfiddle.net/kwoxer/kpL1uyy2/5/:

var projection = d3.geo.projection(function(x, y) { return [x, y];})
        .precision(0).scale(1).translate([0, 0]);
var path = d3.geo.path().projection(projection);

I also tried:

var path = d3.geo.path().projection(null);

but then the whole map was mirrored in the middle.

I think I don't use that system correctly I must assume. The json is fine on mapshaper, too. So do you have some tips, so that I just draw anything I want however big it is and then d3.js is able to draw it as it is. =)

Maybe by

  • normalizing lan/lng
  • disabling KBS

I really don't know why creating an own map is not straithforward.

Edit1: found nearly my issue here http://gis.stackexchange.com/questions/54373/either-geojson-to-topojson-conversion-problem-or-projection-issue-with-d3-js but I got:

C:\Program Files\GDAL>ogr2ogr.exe -f "GeoJSON" -s_srs region.prj -t_srs EPSG:432
6 asdas.json region.shp
ERROR 4: Failed to create GeoJSON datasource: asdas.json.
GeoJSON driver failed to create asdas.json

Edit2: already found this interesting answer: http://gis.stackexchange.com/questions/14731/how-do-i-specify-a-crs-for-a-fictional-game-map-in-qgis

But I used such a projection like he used, but still failing with d3.js.

Answers


I'm just using an own projection now:

+proj=eqc +a=1790493.11 +lat_ts=0 +lon_0=0 +rf=800 +units=m +no_defs

With that projection all is fine.


Need Your Help


About UNIX Resources Network

Original, collect and organize Developers related documents, information and materials, contains jQuery, Html, CSS, MySQL, .NET, ASP.NET, SQL, objective-c, iPhone, Ruby on Rails, C, SQL Server, Ruby, Arrays, Regex, ASP.NET MVC, WPF, XML, Ajax, DataBase, and so on.