geospatial

I am need a Java function that will generate a bounding box (rectangle) around a buffer. The buffer is defined by the center point (WGS84 coordinate) and the radius (in meters). Getting a bounding box for a buffer in JTS seems to be quite simple: Point center = .... Geometry boundingBox = center.buffer(...).getEnvelope(); This however is pure planar geometry. Is there a way to do this using a coordinate reference system with the distance given in meters? Optimally with Geotools but other Java solutions will also work... Although you have approached it in another way, I have another solution

I am using the getData function from the raster package to retrieve the map of Argentina. I would like to plot the resulting map using ggplot2, so I am converting to a dataframe using the tidy function from the broom package. This works fine, but I can't figure out how to preserve the names of the federal districts so that I can use them on the map. Here is my original code that does not preserve the district names: # Original code: ################################## # get the map data from GADM.org and then simplify it arg_map_1 <- raster::getData(country = "ARG", level = 1, path = "./data/")

After reading about MongoDB and Geospatial Indexing I was amazed that it did not support compound keys not starting with the 2d index. I dont know if I would gain anything on it, but right now the mssql solution is just as slow/fast. SELECT TOP 30 * FROM Villages WHERE SID = 10 ORDER BY (math to calc radius from the center point) This works, but is slow because it not smart enough to use a index so it has to calc the radius for all villages with that SID. So in Mongo I wanted to create an index like: {sid: 1, loc: "2d"} so I could filter out alot from the start. I'm not sure there are any

I know this is simple but could get this working. I want to remove the excess data points on the map below. How do i do it? Below code gave me the results. ggplot() + geom_polygon(data = rwa2, aes(x = long, y = lat, group= group), colour = "black", size = 0.5, fill = "white") + geom_tile(data = df, aes(x = Lon, y = Lat, z = z, fill = z), alpha = 0.8) + ggtitle("State Data") + xlab("Longitude") + ylab("Latitude") + scale_fill_distiller(type = "div", palette = "Spectral")+ theme_bw() + theme(plot.title = element_text(size = 25, face = "bold"), legend.title = element_text(size = 15), axis.text =

I've been trying to integrate geospatial search into my rails app for a few days now, but keep getting this error when I run rake sunspot:solr:reindex RSolr::Error::Http - 400 Bad Request Error: ERROR:unknown field 'location_ll' Request Data: "<?xml version=\"1.0\" encoding=\"UTF-8\"?><add><doc><field name=\"id\">Place 1</field><field name=\"type\">Place</field><field name=\"type\">ActiveRecord::Base</field><field name=\"class_name\">Place</field><field name=\"location_ll\">42.348065,-71.083623</field></doc> #etc... keeps going on for all the objects/fields being indexed in the table As far as

While trying to setup to use the Geospatial Index on MongoDB, I run into the error message that the location array is not in the correct format. This is my collection "test". { "_id" : ObjectId("4f037ac176d6fdab5b00000a"), "CorporateId" : "XYZ12345", "Places" : [ { "Location" : { "Longitude" : "50.0", "Latitude" : "50.0" }, "ValidFrom" : "2011-11-01 00:00:00", "ValidTo" : "2021-12-31 00:00:00", "itemCount" : "1" } ] } Once I run this code. db.test.ensureIndex({"Places.Location": "2d"}); I get this error message location object expected, location array not in correct format My assumption is