A spatial data infrastructure (SDI) is a data infrastructure implementing a framework of geographic data, metadata, users and tools that are interactively connected in order to use spatial data in an efficient and flexible way.

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sql server spatial index performance

I have a table with around 2 million records in it. I created a spatial index, using the defaults other than the bounding box. I've been noticing that some queries are extremely fast, and some are ...
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SQL Server 2012 STIntersects

I have one table, T_PIN, with 300,000 pins and another, T_POLYGON, with 36,000 polygons. T_PIN has this index : CREATE SPATIAL INDEX [T_PIN_COORD] ON [dbo].[T_PIN] ( [Coord] )USING GEOGRAPHY_GRID ...
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Geographic Hierarchies in a OLAP Cube / Data Warehouse

Are the following geographic hierarchies correct? Do any US/Canadian area codes cross state/province lines? Do any US/Canadian counties cross state/province lines? Are there countries with counties ...
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How to take advantage of multiple spatial indices?

All, I'm building a view which uses a spatial intersect (STIntersect in MSSQL 2012) between points (student addresses with address information) and polygons (school boundary polygons with school ...
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Find the neighbouring polygons of a given polygon in a MySQL spatial table in ver < 5.6.1

Finding neighbouring shapes in MySQL spatial table made up of ID and 2D geometry (polygon) fields. I have a table with an ID column and a geometry column (holding a polygon) representing various ...
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Is there are way to use Fine Grain Auditing to record Varray bind values?

I have an application, and would like to use Oracle's FGA (Fine Grained-Auditing) to record varray bind information. Specifically, I am using Oracle Spatial and need to know at what extent users are ...
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Combine Oracle locator instance with Oracle spatial instance with db link

we plan to have two oracle databases, one with oracle spatial installed, the other one just has the locator option. Is it possible to create an oracle database link between the two databases in order ...
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106 views

Why do we need myisam spatial extension anyway?

If just to determine whether a point is within a rectangle, What is wrong with this query? EXPLAIN SELECT DISTINCT TB.ID, TB.Latitude, TB.Longitude FROM TableBusiness AS TB WHERE ...
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sdo_tune.quality_degradation returning negative values

While running the sdo_tune.quality_degradation function on one of our Oracle databases most of the results were around 1 but a number had values like -556127.225. Does this mean that these indexes ...
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Raster files into DB2

Team, We have been loading shapefiles into DB2 using db2se import utilities. I have been trying to find help to load Raster files and i wasnt able to find any help on this. it would be really ...
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39 views

Time series indexing

Indexing time series (like in this article) is done by reducing dimensionality and indexing it using some spatial access method (like R-tree). How does that improve performance, though? It's not like ...
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Oracle spatial database

I am trying to run a simple query mentioned on: http://docs.oracle.com/cd/B19306_01/appdev.102/b14255/sdo_operat.htm#g996876 SELECT c.mkt_id, c.name FROM cola_markets c WHERE ...
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Which spatial index support distance sort

Suppose one wants to get features closest to an arbitrary point of interest sorted by the distance to that POI. Which index should be used for features then? In case of Quad tree, for example, as we ...
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39 views

Backup in Mysql periodically

I have trouble scheduling a backup in mysql periodically, most of the tools do not recognize the geometric field, for example navicat which says Can not get geometry object from data you send to ...
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Error creating spatial index sqlserver

I am creating spatial index on sqlserver table. CREATE SPATIAL INDEX [SIndex_udt_cell_SP_GEOMETRY] ON [udt_cell] ( [SP_GEOMETRY] )USING GEOMETRY_GRID WITH ( BOUNDING_BOX =(80.0713, 26.389581, ...