1
vote
1answer
395 views

What is the highest obtainable resolution of FREE elevation data in the UK?

I am seeking closure with this question guys. I am aware of various sources of free elevation data ~30+ m, and I have been searching for higher resolution FREE data for a while now. This already ...
1
vote
2answers
68 views

How to determine elevation of points in shapefile from second shape file using ArcGIS for Desktop?

I am a bit new to arcgis and have run into a snag. I have a series of points in a shapefile that only have x and y coordinates. Additionally I have a series of other points in a separate shapefile ...
0
votes
0answers
19 views

Programmatically download NED, Landcover, etc. data from USGS [duplicate]

What are my current options for downloading geodata (NED, landcover, etc.) from the USGS programmatically?
1
vote
2answers
2k views

Reading National Elevation Dataset (ArcGrid/GridFloat/IMG) with python only tools

I've found high precision elevation (1/3 - 1/9 arcsecond resolution) data from the National Elevation Dataset provided by the USGS. It comes int IMG, Arcgrid, and GridFloat formats. I know ArcGrid ...
4
votes
2answers
423 views

How to manually edit 16 bit GDEM elevation data on a Geotiff file

I'm building a virtual 3D terrain scenery using both satellite imagery (google maps satellite) and elevation data from GDEM Aster elevation data (geoTIFF format files). My problem is that the ...
2
votes
1answer
378 views

Programmatically download (seamless) NED tiles?

I used to download 1/3 arcsecond elevation geotiffs from extract.cr.usgs.gov using web services. But a few days ago, that stopped working, probably because USGS reorganized their site. I tried ...
3
votes
1answer
107 views

Help obtaining nodata information for ASTER datasets

Is there any way to determine what the nodata value should be, in a set of geotiff images that do not have the 42113 tiff tag ? I am trying to get elevation information, programatically in c++, and I ...
1
vote
0answers
57 views

Process to load elevation data into Oracle 11G

We have the National Elevation data set from USGS and considering loading it into Oracle (11G) database. Can someone help with the process/steps?
12
votes
3answers
4k views

How to download the entire ASTER GDEMv2 dataset?

On October, NASA released the new ASTER GDEM global dataset (30m) and I have been wanting to get my hands on it. The only problem is that it takes forever to download and I do not feel like drawing ...
12
votes
3answers
4k views

Where to download free elevation data for Europe?

Where can I find free elevation data for Europe? Please mention the available resolutions and terms of use when posting a source.