0
votes
1answer
62 views

GeoReference use wordfile in arcgis [duplicate]

I have a tiff image and have the required information to Geo-reference it on the MAP. which called world file like this. using GMAP.NEt API there are many limited functions not like the java script ...
0
votes
0answers
159 views

cut tiles with gdal2tiles.py from a png with world coordinate info

I have a collection of PNG files that use the standard google maps projection and have baked into the filename of each the zoom level (all of them are at 22), the x and y pixel coordinates of the ...
4
votes
1answer
3k views

Transforming EPSG:3857 to EPSG:4326

I am new to gdal and have a simple question. I want to transform an image from OpenStreetMap projection to Nasa Blue Marble projection. What I understand is that OpenStreetMap projection is EPSG:3857 ...
4
votes
1answer
3k views

Calculate lat lon bounds for individual tile generated from gdal2tiles

I have multiple tile sources generated using gdal2tiles I'd like to present on the same map. So when presenting a tile I need to determine which source to serve it up from, checking against the ...
3
votes
1answer
2k views

Georeferencing with Quantum GIS and reprojecting to EPSG:900913

I'm trying to reproject a map to EPSG:900913 The image I'm reprojecting is the following http://i.imgur.com/HmfLW.png I'm using the cities as reference points obtaining the coordinates from Google ...
6
votes
0answers
982 views

How to create a 4096x4096 png from a 1440x720 data set using GDAL?

I'm having a bear of a time trying to do something that seems fairly straightforward. I'm trying to take a netcdf file from ftp://eclipse.ncdc.noaa.gov/pub/OI-daily-v2/NetCDF/2011/AVHRR-AMSR/ and turn ...
3
votes
1answer
210 views

Unexpected Result After Reprojection Attempt

I'm a member of a student team that is currently researching how to query raster information using PostGIS v2.0. Our raster's coordinate system is EPSG 2236 (NAD 83 / Florida East) and as we will be ...
8
votes
4answers
1k views

Performance of google map tile creation processes

I know that question is rather vague but please bear w/me. I'm trying to get an idea of what sort of product performance - specifically timing - people have seen for various methodologies they have ...