Roger Bivand wrote:
> On Wed, 7 Mar 2007, Schmitt Thierry wrote:
>
>
>> I am struggling to overlay spatialLinesDataFrame and
>> SpatialGridDataFrame. The overlay method doesn't allow me to do so.
>>
>>
>
> There is no overlay method, you would need to write one, or interpolate
> points alo
Our primary developer for starspan (I designed the program, but did none of
the coding) has since moved on to bigger and better things, but I would
LOVE to get some help getting starspan cleaned up so it can be a GRASS
add-on. If anyone is interested, please send me an email about it --
ultimately
On Wed, 7 Mar 2007, Schmitt Thierry wrote:
> I am struggling to overlay spatialLinesDataFrame and
> SpatialGridDataFrame. The overlay method doesn't allow me to do so.
>
There is no overlay method, you would need to write one, or interpolate
points along your lines and overlay the resulting poi
I am struggling to overlay spatialLinesDataFrame and SpatialGridDataFrame. The
overlay method doesn't allow me to do so.
As mentioned by matt, I might have a look at starspan. However, I might be
interested to have some solution within the Grass/R interface
Thierry
Using the classes and methods for spatial data in package sp, typically
the dem would be stored in a grid (SpatialGridDataFrame) and the vector
data in a SpatialPointsDataFrame. Then you can use the overlay method to
retrieve the dem values at point locations, to look at their relationship.
--
E
Hi members of the list
I am new to the R community (somewhat to the grass community also). I would
like to see if there is any correlation between vector data (polyline connected
to a db file) and classes from an analysis on a raster file. Namely I have an
underwater DEM (raster 4m resolution)
