Tagged Questions
3
votes
2answers
50 views
Performance loss for OpenLayers EPSG transformation? Storing GeoJSON coordinates in lat/lon or in native map projection?
For a project the map projection is EPSG:32468 (tiles). On top of the map, two or three GeoJSON LineStrings should be displayed using OpenLayers. Each LineString has about 1500 coordinates.
...
0
votes
0answers
48 views
OpenLayers - Transform resolution
I want display resolution of the map for each zoom level. So I've create event listener for zoom event, but it is displayed in different projection that I want (I guess). So I need to transform this ...
2
votes
1answer
338 views
Openlayers Transform not transforming a point from EPSG 27700 to EPSG 4326
I am trying to add Google street view functionality to a Openlayers Map. I have started by using 3 divs to hold the Openlayers Map (which uses a local tilecached base map), a google api map and ...
1
vote
2answers
317 views
Howto change OpenLayers BBOX request projection?
My map uses EPSG:900913 projection on the map.
All coördinates in the database are stored in the 'normal' google format / GPS coordinates (WGS84). For instance, if you save a new location..Before I ...
2
votes
1answer
589 views
How to use OpenLayer.Transform?
I want to draw a rectangle. The coordinates are somewhere in northern Germany. But the rectangle shows up in the Near East? What am I doing wrong?
var epsg900913 = new ...
0
votes
1answer
160 views
coordinate projection
I'v got a detail map for an event as PDF an made an openlayers slippy map with Maptiler. I now need to place markers at the position of gps/gsm-trackers, which store their coordinate on a server.
The ...
0
votes
1answer
317 views
Reprojecting non 4326 WMS image to spherical mercator
In OpenLayers, I'm trying to display a WMS overlay (EPSG:4269) from a server I don't have control over to a spherical mercator projection.
Is there an equivalent to this:
...
1
vote
0answers
136 views
On the usage of Proj4Js->tmerc.js
I am using "proj4js & open layers" for my mapping.
I got projection & datum (which is based on "Transverse Mercator") of a local plane and
this plane is part of a grid which returns ...
0
votes
2answers
133 views
How do you pass parameters for Proj4js implementation with OpenLayers
I am using Proj4js along with OpenLayers for the transformation of x,y (projection type is Transverse Mercator) to long, lat.
While executing "inverse()" method what I noticed that in tmerc.js some ...
1
vote
2answers
1k views
How can I get the values returned by an OpenLayers bounds object in Longitude / Latitude format?
I've created a map and added a layer using the Open Layers library:
map = new OpenLayers.Map('map');
var gphy = new OpenLayers.Layer.Google("Google Physical", {type: G_PHYSICAL_MAP});
...
4
votes
4answers
3k views
How to reproject base layers in OpenLayers?
The issue is:
I have vector/topo/image tiled maps for some places in north america which were published as ArcGIS Server REST service. These maps (A) are based in EPSG26912 projection. Now I wanna ...
2
votes
1answer
603 views
How to provide transform information to openlayers on Image layer
I would like to include an overlay raster layer into my OpenLayers map. I've pre-transformed the image into the correct projection (EPSG:900913) and saved as a png using the gdal_translate command:
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