spatial

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Intersecting Points and Polygons in R

I am working with shapefiles in R, one is point.shp the other is a polygon.shp. Now, I would like to intersect the points with 开发者_运维知识库the polygon, meaning that all the values from the polygo[详细]

2023-01-15 10:36 分类：问答
How to attach a simple data.frame to a SpatialPolygonDataFrame in R?

I have (again) a problem with combining data frames in R. But this time, one is a SpatialPolygonDataFrame (SPDF)and the other one is usual data.frame (DF). The SPDF has around 1000 rows the DF only 40[详细]

2023-01-14 19:29 分类：问答
Disambiguate overlapping lines in SQL Server spatial or OpenLayers?

I have records in a table representing bus routes, with SQL Server spatial columns for the actual route geometry. (They\'re stored in a Geography column type.)[详细]

2023-01-14 15:37 分类：问答
3D clustering Algorithm

Problem Statement: I have the following problem: There are more than a billion points in 3D space. The goal is to find the top N points which has largest number of neighbors within given distance R.[详细]

2023-01-11 07:22 分类：问答
how to store spatial files in MySQL

what开发者_高级运维 is a better way to store spatial data in MySQL (say tracks) internally or as references to the external flat files?MySQL has a spatial extensions to store geographic objects (objec[详细]

2023-01-10 16:50 分类：问答
Is it possible to connect Oracle with ArcGIS for doing spatial query?

Is it possible to connect Oracle w开发者_JS百科ith ArcGIS for doing spatial query?Google suggests you use ArcSDE, or possible Direct Connect[详细]

2023-01-09 20:34 分类：问答
Can subsonic handle spatial data. If so how?

I\'ve开发者_StackOverflow中文版 been using subsonic for quite a while now and I seem pretty confident about using it in my thesis. What I\'m not sure about is how will it handle geometry data types. A[详细]

2023-01-09 19:34 分类：问答
PostGIS: Finding LineStrings that overlap a box

I want to specify a box (i.e. 2 points) and select all the linestrings that are either within or intersect the box.[详细]

2023-01-09 19:05 分类：问答
zend framework with spatial

I am using zend framework with MySQL. I am using Zend_Db_Table_Abstract to run queries. I have a spatial field in a table :[详细]

2023-01-08 20:17 分类：问答
Finding a Subset of Points by Relative Distances

I\'m writing a game in which the player may manipulate a great many objects at one time. I would like the player to be able to select objects according to the distances between them.[详细]

2023-01-07 01:17 分类：问答