As I mentioned in the tweet, I was able to fix this on both a Fedora 23 and
Fedora 27 machine by making the following change to configure.ac:
diff --git a/configure.ac b/configure.ac
index 8ff72be..ab4c772 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,6 +3,8 @@ define([pkgversion],
that lets you t() the result makes sense to me if only as
a backwards compatibility feature.
-Colin
-
Colin Rundel
Assistant Professor of the Practice
Duke University, Department of Statistical Science
colin.run...@stat.duke.edu
www.stat.duke.edu/~cr173/
> On Sep 7, 2016, at 8:23 AM, Ro
Hi Sancta,
The issue is likely occurring due to the version of the geos C library you have
installed on your system. You will need to provide us with a few more detail on
what operating system you are running. Additionally, if you are on a unix/linux
or mac system try running `geos-config
This issue is occurring because your poly2 object contains a canopy polygon
that is also in the poly object, as such when calculating the intersection the
resulting geometry contains that canopy polygon as well as the intersection
polygon which is not a valid geometry hence the error. You can
You can look into using the spBayes package using gaussian predictive process
models to handle the large number of observations.
-Colin
On Jul 15, 2013, at 1:08 PM, Moshood Agba Bakare bak...@ualberta.ca wrote:
Dear All,
Please which of these packages - gstat and geoR is better for fitting
The gSimplify function in rgeos wraps geos' implemention of the Douglas-Peucker
algorithm so it should be easy to try it out for this particular problem, the
topologyPreserve argument may also help (the geos documentation doesn't mention
the specific implementation differences between the two
Hi Colin,
You can try the following code to separate the resulting polygons and their
holes from the other polygons. Basically you can find the parent / hole
relationship by checking the comment attribute of the Polygon object. Currently
it is a kludgy hack since sp objects were not originally
While I think it is somewhat simplistic for modeling a species' distribution
you can use a convex hull to get a convex bounding polygon for your presence
locations. This will not take into account islands but you can remove
non-terristrial areas by getting an intersection of the bounding
That is odd, it isn't an error that I've seen before. What version of R are you
running and can you check what version of plyr and stringr you have installed?
-Colin
On Oct 25, 2011, at 3:11 PM, Nick Matzke wrote:
Thanks so much! I've almost gotten rgeos to install, however I'm getting a
PM, Colin Rundel wrote:
That is odd, it isn't an error that I've seen before. What
version of R are you running and can you check what
version of plyr and stringr you have installed?
-Colin
On Oct 25, 2011, at 3:11 PM, Nick Matzke wrote:
Thanks so much! I've almost gotten rgeos
Hi Mathieu,
I'm not sure why RStudio is crashing on you with that input, on my apple laptop
with R 2.13.2 I get the following error when I run your sample code:
Error in RGEOSBinTopoFunc(spgeom1, spgeom2, byid, id, rgeos_intersection) :
TopologyException: no outgoing dirEdge found at 898287
Hi Ben,
My best guess based on the information you have provided is that R is running
out of memory, particularly for complex polygons Unions can use a huge amount
of memory. Can you check with the task manager what the memory usage looks like
when running your code?
-Colin
On Sep 7, 2011,
Which sp objects does quadsegs argument in gBuffer affect (or rather, which
it does not)? Based on my experiments, SpatialPoints - SpatialPolygons is
not affected. I use SpatialPoints to draw circles (see below) and I figured
that specifying the quadsegs would alter the roughness of the circle
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