spatial

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Oracle SQL query or function to cluster geographic data

I have a table containing geographic data and I want to group rows on the proximity of the X and Y coordin开发者_如何学JAVAates. So, given an offset, n, and a table with columns X and Y, I want to gro[详细]

2023-02-18 01:29 分类：问答
Interpolation Contours with Spline in ArcGIS 10

I have contours (about 5000 polylines) in shapefile and I need to interpolate those with Spline. But Spline function in ArcGIS 10 can only interpolate points, and my contours are polylines. I hope开发[详细]

2023-02-16 19:02 分类：问答
SQL Server spatial and linked servers

I have a SQL Server instance that I\'ve added a linked server to another SQL instance. The table I\'m accessing on the linked server contains spatial types. When I try to que开发者_运维技巧ry the tabl[详细]

2023-02-16 13:43 分类：问答
Finding specific shapes in point clouds quickly

I\'ve got a point cloud, and would like to detect occurrences o开发者_JAVA百科f certain patterns of points in my code.[详细]

2023-02-14 05:17 分类：问答
Sql 2008 geometry type and fluent nhibernate

I ha开发者_运维问答ve to use spatial index to search defined area on the map. I\'m having difficulties with mapping sql geometry type using c# classes and fluent nhibernate. There are some posts about[详细]

2023-02-13 00:08 分类：问答
Lucene DistanceQueryBuilder

I am having a few problems understanding Lucene Spatial (partially due to a lack of documentation and good examples and partially due to stupidity I am sure!)[详细]

2023-02-11 03:41 分类：问答
Performance of Multiple Joins

Greetings Overflowers, I need to query against objects with many/complex spacial conditions. In relational databases that is translated to many joins (possibly 10+).[详细]

2023-02-10 13:09 分类：问答
GWT + Lucene-spatial (via Hibernate Search)

Ok I have re-phrased the question a bit as I have made some progress... Hi, I have been searching around for the last day (badly) to try to 开发者_StackOverflow社区find some help on how to use Lucen[详细]

2023-02-09 20:03 分类：问答
SQL Server 2008 Performance on nullable geography column with spatial index

I\'m seeing some strange performance issues on SQL Server 2008 with a nullable geography column with a spatial index. Each null value is stored as a root node within the spatial index.[详细]

2023-02-09 10:45 分类：问答
How is `@geodist` sorting/search implemneted in Sphinx?

Does @geodist search use 开发者_C百科any sort of geospatial indexes (like R-trees) for performance?[详细]

2023-02-06 22:05 分类：问答