polygon

I have an issue, in my leaflet map I've created a triangle from polygon: var polygon = L.polygon([ [parseFloat(decimal_lat),parseFloat(decimal_lon)], [parseFloat(decimal_lat) + 1, parseFloat(decimal_lon) - 1], [parseFloat(decimal_lat) + 1, parseFloat(decimal_lon) + 1] ], { color:'green' }); polygon.addTo(map); and I want to rotate this polygon around Point[decimal_lon, decimal_lat] . But I'm not able to solve it.. I've created DEMO , where I'm rotating polynom the same I want to rotate my triangle (polygon) to show you my problem. One way to do it is through matrix rotation. https://en

I have a SpatialPolygonsDataFrame with 11589 spatial objects of class "polygons". 10699 of those objects consists of exactly 1 polygon. However, the rest of those spatial objects consist of multiple polygons (2 to 22). If an object of consists of multiple polygons, three scenarios are possible: 1) The additional polygons could describe a "hole" in the spatial area described by the first polygon . 2) The additional polygons could also describe additional geographic areas, i.e. the shape of the region is quite complex and described by putting together multiple parts. 3) Often it is a mix of both

My current implementation doesn't show anything on the form even though the collections I thought bounded have data (I checked in debug). Here's some code: public event PropertyChangedEventHandler PropertyChanged; PointCollection imagePoints; public PointCollection ImagePoints { get { return this.imagePoints; } set { if (this.imagePoints != value) { this.imagePoints = value; if (this.PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs("ImagePoints")); } } } } and the corresponding xaml: <Polygon x:Name="imagePolygon" Points="{Binding ImagePoints}" Stretch="Fill" Fill=

I have used the code in the following : http://www.amphibian.com/blogstuff/collision.html . in the html test file I have changed the the first triangle to triangle1.addPoint({"x":-20, "y":-20}); triangle1.addPoint({"x":-20, "y":20}); triangle1.addPoint({"x":20, "y":20}); triangle1.addPoint({"x":20, "y":10}); triangle1.addPoint({"x":10, "y":10}); triangle1.addPoint({"x":10, "y":-20}); now when I move the other triangle with inside this shape before crossing it gives me wrongly intersection. Any idea where could be the problem? All right, I set up a fiddle for anyone else wanting to play with

When I use stat_contour with polygon, some regions should not be filled because there is no data there, i marked them in the figure. Does anyone know how to avoid that? In addition, there is space between axis and plot region, how to remove it?! Here is the plotting code: plot_contour <- function (da, native ) { h2d<-hist2d(da$germ_div,da[[native]],nbins=40,show=F) h2d$counts<-h2d$counts+1 counts<-log(h2d$counts, base=10) rownames(counts)<-h2d$x colnames(counts)<-h2d$y counts<-melt(counts) names(counts)<-c('x','y','z') ggplot(counts,aes(x,y))+ stat_contour(expand=c(0,0),aes(z=z,fill=..level..)

I have some polygons indexed in Solr. Is it possible to query with a point(lat,lon) and see which polygon has that point inside? user2894821 Yes it is possible and described here: http://wiki.apache.org/solr/SolrAdaptersForLuceneSpatial4 Your Solr Version must be 4 or higher and you have to import the JTS jar-file which you can get from http://sourceforge.net/projects/jts-topo-suite/ You have to define a field with a fieldType of location_rpt <fieldType name="location_rpt" class="solr.SpatialRecursivePrefixTreeFieldType" spatialContextFactory="com.spatial4j.core.context.jts

Imagine I have the coordinate of 4 points that form a polygon. These points are represented using PointF in C#. If I have 2 polygons (using 8 points), how can I tell if they intersect? Rectangle class has a method called IntersectsWith but I couldn't find something similar for GraphicsPath or Region. Any advice would be greatly appreciated. Mosh Patrick Klug As Charlie already pointed out you can use the Separating Axis theorem. Check out this article for a C# implementation and example of polygon collision detection. I have also answered this question here which deals with 2D collision in C#.