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.

learn more… | top users | synonyms (3)

0
votes
1answer
35 views

Insert GEOMFROMTEXT (lat lng)

I am stuck, Please help. "INSERT INTO `routeplans` ( `polygon` ) VALUES ( GEOMFROMTEXT( 'POLYGON( (39.593254951279626 -119.2415714263916, 39.596231192849004 -119.2441463470459, ...
4
votes
0answers
165 views

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 ...
3
votes
0answers
34 views

Can SQL Server use a spatial index and another index at the same time and be efficient?

Let's say we have a table that contains two terrain datasets defined by TerrainModelID like below: CREATE TABLE [dbo].[DigitalTerrain]( [DigitalTerrainID] [uniqueidentifier] NOT NULL, ...
3
votes
0answers
67 views

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 ...
2
votes
0answers
49 views

ST_GeomFromGeoJSON() Causes postgres to crash

I'm running into a strange problem which I can't solve. The server crashes when executing some postgis related queries. After some debugging, using the examples provided by postgis, it appears the ...
2
votes
0answers
174 views

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 ...
1
vote
0answers
78 views

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 ...
1
vote
0answers
39 views

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 ...
1
vote
0answers
127 views

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 ...
1
vote
0answers
60 views

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 ...
1
vote
0answers
107 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 ...
1
vote
0answers
56 views

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 ...
0
votes
0answers
50 views

MongoDB to store vehicle tracking information

I am building an app similar to Uber for tracking vehicles. Since the update frequency is so high (accounting for several users), I want to know the general practices involved for making writes faster ...
0
votes
0answers
116 views

Suitable database to store GPS track data

I have a network of vehicles. Each vehicle is equipped with a GPS sensor sending data over 3G to my FTP server. As a first solution to test the sensors, each vehicle sensor sends a .csv file to the ...
0
votes
0answers
33 views

Optimised way to search over 2 milllion poi data in mysql

We have over 2 million poi data in our mysql db. At any time we need to find what is the nearest point based on the following formula found at this link http://sqlfiddle.com/#!2/abba1/4 select *, ( ...
0
votes
0answers
36 views

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 ...
0
votes
0answers
25 views

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 ...
0
votes
0answers
56 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 ...
0
votes
0answers
87 views

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, ...