The process of interpolating new cell values when transforming rasters to a new coordinate space or cell size.
2
votes
1answer
40 views
Is GeoServer Image Pyramid upscaling?
I have an Image Pyramid in GeoServer 2.2 RC3 (not the latests - I know, but I have other pyramids working here).
The total size is around 1TB and file size is around 1-2GB for each GeoTIFF.
When ...
3
votes
1answer
49 views
Differences in raster extents in gdalinfo, SAGA & Quantum after resampling
I recently resampled a raster file using SAGA's Resampling module. The aim was to widen the extent of the new raster to two decimal places, where the original raster has three decimal places. The ...
0
votes
0answers
210 views
How to resample a raster in QGIS?
I've got a boundary file that I would like to resample the raster file from a 30m grid to a 10m grid inside the boundary file. When I try and do it in Qgis or Grass all I get is one big raster cube ...
7
votes
2answers
366 views
Resample binary raster to give *proportion* within new cell window
I would like to go from a binary raster of forest/non-forest at 30m resolution to a raster at 240m resolution with the value of each cell being the proportion of that cell forested - i.e. the data ...
2
votes
0answers
148 views
Raster format with rotated cells - no resampling
Is there any way to rotate a raster w/o resampling? I am aware that rasters are always 90 deg perpendicular grids, but is there any file format or methodology that allows for a diagonal raster - one ...
5
votes
1answer
229 views
Change the image size in ARCGIS
I did interpolation operation on temperature and precipitation data. Output image size is 3300 (col) and 2550 (row). I have some NDVI images with size of 15456 (col) and 5074 (row). Generally, I want ...
12
votes
1answer
622 views
What resampling technique should be used when projecting aerial photos?
I'm doing some time-intensive projecting of aerial photos, and I'm curious - what resampling technique is best to use on aerial photos? In ArcMap, my options are NEAREST, BILINEAR, CUBIC, and ...
16
votes
3answers
2k views
What is Lanczos resampling useful for in a spatial context?
GDAL includes a resampling method beyond the normal mix of nearest neighbor, bilinear, cubic and splines: "Lanczos windowed sinc resampling". I understand that its a convolution filter, but unlike ...
3
votes
1answer
239 views
Converting dataset between coordinate systems
I'm working with NOAA's PRECipitation REConstruction over Land dataset, and am looking for an efficient way to sample the data by pixels on NASA's MODIS grid, using open source tools. The PRECL data ...
11
votes
4answers
8k views
How do you decide what interpolation method to use for resampling raster data?
The question pretty much says it all; are there hard and fast rules about which interpolation methods are suited to each kind of raster data? Any Golden rules, rules of thumb? Good books or articles ...
