I've got a slightly older version of the data you're using (OS 10k B&W,
but with 2 bits per pixel rather than four), and I've used a two-stage
process to achieve what you want.
First, I used gdal_translate to expand the image to 8-bit greyscale:
gdal_translate -co "TFW=YES" -co "TILED=YES" -expan
> > The trick is your netCDF has to meet a bunch
> > of constraints for ArcGIS to recognize it. It has to have square cells.
>
> bingo -- that was one of our key problems -- wait -- they have to be
> "square" -- rectangular won't do? arrgg!
Oops, I'm pretty sure you're right, they can be rectangu
Jason Roberts wrote:
The trick is your netCDF has to meet a bunch
of constraints for ArcGIS to recognize it. It has to have square cells.
bingo -- that was one of our key problems -- wait -- they have to be
"square" -- rectangular won't do? arrgg!
Oops, I'm pretty sure you're right, they can b
We are using OGRLayer SetAttributeFilter to implement some search
capabilities. One feature that we want to allow is using the SQL "Like"
operand in the where clause to allow wildcard searches or searches on
partial fields.
The documentation says that "Like" is not supported but it appears to
On Mon, Jun 21, 2010 at 4:52 PM, Chris Bailey
wrote:
>
> We are using OGRLayer SetAttributeFilter to implement some search
> capabilities. One feature that we want to allow is using the SQL "Like"
> operand in the where clause to allow wildcard searches or searches on
> partial fields.
>
> The do
This is the documentation I was referring to:
http://www.gdal.org/ogr/classOGRLayer.html#cb2c6cc5fa3577df5be538284c1b0dde
Set a new attribute query.
This method sets the attribute query string to be used when fetching
features via the GetNextFeature() method. Only features for which the query
e
I am using "convertRastertoArray" (modifying the array) and then using
"convertArraytoRaster".
The problem is that when I convert back to raster, the projection information
is lost.
The projection of my input is: WGS 84, UTM 17N. (EPSG = 32617)
Can someone provide some code as to the cl
I find this categorization helpful:
http://en.wikipedia.org/wiki/Regular_grid
Any GIS will do regular and cartesian grids (but usually bound to 2D),
and with programming constructs you can handle rectlinear or
curvilinear grids of any dimension, but it's not well supported in
high-level software
GDALCreateCopy() can help you with creating a raster with the same data
including the projection and stuff. You can edit the pixels without
bothering about the projection. Use GDALRasterIO() to read and write to that
raster.
http://www.gdal.org/gdal_tutorial.html
http://www.gdal.org/gdal_8h.html
