I found some open source R-Tree implementations in C#, but none with documentation nor signs of being used by someone else than the developer.

Like most of the average PHP web developers I use MySql as a RDBMS. MySql (as other RDBMS also) offers SPATIAL INDEX features, but I'm don't get it very well. I have googled for it but didn't find ...

Do anyone know why MongoDB use B-Tree but not B+-Tree? As I know most DBMS use B+-Tree. Are there any special reason for MongoDB to use B-Tree? thanks.

I am running following: DECLARE @g geography; declare @point nvarchar(50) ='' declare @i int =0, @lat decimal(8,6) =0.0, @long decimal(8,6) =0.0, @start datetime = getdate() set @lat =(select (...

I'm working on a flocking boids simulation just for fun, and I want to optimise it a bit. The area that needs work is finding boids near a given boid. I figure that to do that some kind of spatial ...

Here's my code: SET @poly = 'Polygon((-98.07697478272888 30.123832577126326, -98.07697478272888 30.535734310413392, -97.48302581787107 30.535734310413392, -97.48302581787107 30.123832577126326...

Okay, so I am trying to install libspatialspatialindex to my Ubuntu machine python. I did follow all the instructions and downloaded libspatialindex1_1.4.0-1.1_amd64.deb from http://packages.ubuntu...

I am not an expert at Postgres/GIS subjects and I have an issue with a large database (over 20 million records) of geometries. First of all my set up looks like this: mmt=# select version(); -[ REC...

I'm looking at implementing spatial queries in .NET without using SQL2008. The first requirement is to be able to create a (BTree styled) spatial index and be able to query it. Although SQL ...

In my application there is a use case to find the closest point to some other geo point. I decided to use in-memory spatial index and found several candidates: jeospatial and Lucene spatial. I mad...

Why is this not returning a count of number of points in each neighbourhoods (bounding box)? import geopandas as gpd def radius(points_neighbour, points_center, new_field_name, r): """ :param p...

In the example page it is shown how to do a neighbor search with a limit on the number of returned items. Is it possible to also specify a distance limit? I.e.: Return all items that are at most...

Well, the question is clear enough. Is it possible to create spatial indexes using Entity Framework 6.1 fluent API?

First, here is my stack description :  Neo4j 2.3.0 on GrapheneDB + Neo4j Spatial plugin 0.15 Ninja Framework 5.2.1 java server on my PC Neo4j-OGM 1.1.3 for entity mapping Geotools 14.0 for geos...

I am using jts geometry object to store my geometry objects as an Oracle SDO_Geometry. However when I want to use SDO_GEOM.RELATE methods they are not working properly,I realized that I need to cre...

Given n points in d-dimensional space, there are several data structures, such as Kd-Trees, Quadtrees, etc. to index the points. On these data structures it is possible to implement straight-forwar...

I am attempting to utilize the spatial index. I have a table of ips, and a ip2geo table with ip block ranges. I'm attempting to assign Geo ID to each ip from the ip2geo table When attempting to to...

Background I have a table that contains POLYGONS/MULTIPOLYGONS which represent customer territories: The table contains roughly 8,000 rows Approximately 90% of the polygons are circles The remai...

I'm working on moving some spatial searching capabilities from Postgres with PostGIS to SQL Server and I'm seeing some pretty terrible performance, even with indexes. My data is around a million p...

A little background on design decisions thus far... I have developed an octree structure that can store points. I have chosen to limit the recursion of "generations" based on a certain base voxel s...

Are there any good implementations of spatial indexes in Haskell such as R-tree, kd-tree, etc...

I have ~400k points of interest that are stored in GEOGRAPHY spatial sql. I will be querying these points with PointOfInterest.STDistance(@CentralPoint) < @Radius to find PointOfInterest's with...

I have a dataset with about 100000 points and another dataset with roughly 3000 polygons. For each of the points I need to find the nearest polygon (spatial match). Points inside a polygon should m...

I am currently using SOLR 4.2 to index geospatial data (latitude and longitude data). I have configured my geospatial field as below. <fieldType name="location" class="solr.LatLonType" subFiel...

I'm having some fun trying to pick a decent SQL Server 2008 spatial index setup for a data set I am dealing with. The dataset is polygons, representing contours over the whole globe. There are 106...