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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The definitive fastest radius search query with Postgis 2.0

I come from mysql world. I read the manual and saw some examples, after that, I'm not able to say witch method is the fastest for a radius search. Nobody seems to agrees. My simple case: I need to ...
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3answers
148 views

Trying to create PostGIS database

I am trying to create a spatially enabled PostGIS database by following the PostGIS documentation. In the short version, i executed, createdb yourdatabase createlang plpgsql yourdatabase But I did ...
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37 views

SQL Server spatial geometry properties on index

Is there a way to add geometry.STSrid(object property) to a spatial index or is it already added when I create a spatial index in SQL Server 2012. I have mixed SRID table and I was wondering if it ...
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2k views

Convert spatial points data to line data for use in Line Layer in SQL Server Reporting Services (SSRS)

I have a query that returns the fields Order, Lat, Long, SpatialData, <OtherStuff>. SpatialData is a point. I want to create a line layer that draws lines between my points based on the order ...
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49 views

Optimizing an Intersect query between two huge spatial tables

I am having a hard time trying to improve an intersect between two spatial tables and I would like to receive any tips about the table designs, queries or dba configs. Tables: Table ...
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2answers
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How to get the size of a spatial index?

I want to see the size of a spacial index. I am usually using one of the following code blocks to get the indexes sizes of a given table, but none of them is working for a spatial index. DECLARE ...
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1answer
15 views

How do I create a new mongo collection with custom indices from an existing mongo db? [closed]

I have a mongo database collection, that I want to modify. I would like to add new indices (text and geo) to the existing data, and remove unnecessary fields. What would be the best way to do this? ...
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23 views

N-dimensional vectors in PostgreSQL Spatial Index

I have many 8-dimensional vectors. And I want to construct on them a R-tree ('USING gist' in PostgreSQL). But I have got stucked at the choice of the correct geometrical type. Whether the 'path' type ...
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298 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 ...
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2k views

Can spatial index help a “range - order by - limit” query

Asking this question, specifically for Postgres, as it has good supoort for R-tree/spatial indexes. We have the following table with a tree structure (Nested Set model) of words and their ...
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1answer
52 views

How to dump a postgreSQL/postgis sample database filtered by a spatial extent?

My goal is to extract a subset of my postgres/gis database to create a sample dump which has to have the same data model with relations between tables and views, but which has a smaller spatial ...
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1answer
815 views

Decimal or Point Data Type for storing Geo location data in MySQL

I want to store Geo location for each Address in my MySQL(Innodb) "tblAddress" table and I think I have 2 Options: 1) 2 columns for Each Address: Latitude DECIMAL(10, 8), Longitude DECIMAL(11, 8) ...
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24 views

Why is my spatial index not being used on Mariadb?

I have a spatial index on geo column, but when I do EXPLAIN it doesn't show that the index is being used. Can anyone tell why? EXPLAIN SELECT AsText(geo) FROM marker WHERE ...
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27 views

implement geo / spatial / proximity search with php and mysql — what have you done successfully

For my website's users, I want to implement a worldwide geo / spatial / proximity search with php and mysql. I want to do this as simply and minimally as possible. What is the minimum data I should ...
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1answer
51 views

Do mongodb's 2dsphere index works on multidimensional coordinantes array?

if i create a index like that : db.createCollection("users") db.users.ensureIndex({coordinates:"2dsphere"}); and then insert a point var point = { type: "point", coordinates: [ 1, 2, 3, 4 ] ...
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1answer
289 views

Are unfixable spatial index corruptions considered normal?

I have a spatial index for which DBCC CHECKDB reports corruptions: DBCC CHECKDB(MyDB) WITH EXTENDED_LOGICAL_CHECKS, DATA_PURITY, NO_INFOMSGS, ALL_ERRORMSGS, TABLERESULTS The spatial index, XML ...
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1answer
136 views

Improving a DbGeography query

I am still new to database administration and I'm trying to optimise a search query. I had a query which looked like this and took 5-15 seconds to execute in some cases, and also was causing 100% CPU ...
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774 views

MySQL 5.7 InnoDB is extremely slow on spatial data compared to MySQL 5.6

I have a table area which contains ~300,000 rows. It is defined as follows: CREATE TABLE `area` ( `area_id` bigint(20) NOT NULL AUTO_INCREMENT, `boundary` geometry NOT NULL, `name` varchar(255) ...
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1answer
96 views

Minimum distance of a location; one table of points compared to a set of points SQL 2012

I am trying to find the quickest way to find the minimum distance of one point to a table of points. The only caveat is that the table of the points I'm trying to find the minimum distance of is 150K ...
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1answer
36 views

Postgis radius search

I have a table setup with the following columns, and it containts about 100K listing of data. Column: address | Type: Text Column: geo_point | Type: geometry(Point,4326) My question is for ...
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51 views

Access points of geometric path data in PostgreSQL 8.1

Summary: I would like to perform basic operations on the points of geometric path data contained in a PostgreSQL 8.1 server which I do not have administrative access to. In particular I would like to ...
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26 views

PostGIS radius search performance

In my Postgres database, there is a listing table, inside that table, I have a column called geo_point, which stores latitude and longitude information. The column type is geometry(Point,4326). I ...
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25 views

Performance issues when using 2dsphere indexes

I'm working on mongodb for geospatial processing. Currently I'm ingesting about 8 million GeoJSON, that initially were stored as point data, taking about 20 minutes to index. Recently, we changed the ...
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1answer
102 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 ...
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27 views

What Database is optimized for 4d data layout? [closed]

I need to store 4d data points inside a virtual 3d world (position+date+data value). I have a lot of data layers > 250 (wind direction, sea temperature, terrain type, etc). Sources of my data layers ...
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2answers
185 views

Store geo location data in MySQL

I would like to know how should i store longitude and latitude values in a mysql database, maybe the questions should be: Decimal vs Point (Spatial Data) I found this question where the question is ...
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1answer
38 views

Advantages of POINT over DOUBLE for distance queries?

I'm about to start an application that will need a simple distance query to order results. After some search I've discovered some functions that seems to do this work pretty easily without needing ...
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56 views

SQL Server 2012 duplicate key error with Spatial index that shouldn't be unique

We have a table that has a geometry column that is filled by a stored procedure from two x and y values whenever they're changed ( SW_GEOMETRY = GEOMETRY::STGeomFromText('POINT('+ ...
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1answer
105 views

Two servers, different execution plans. Several orders of magnitude difference in run time

Two servers, Development and Live. Live server is an Amazon RDS SQL Server Web instance. Both servers have identical schema and data. There is a good spatial index on the geometry column. On my ...
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1answer
63 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 *, ( ...
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0answers
51 views

How to implement search for world-wide Wikipedia/OSM places with alternative-names

I would like to implement a search-backend which returns a location-aware search results of all Wikipedia / OSM place names, while recognising place names in all languages. Thus, if you search for ...
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1answer
488 views

Insert GEOMFROMTEXT (lat lng)

I am stuck, please help. The following SQL statement works: "INSERT INTO `routeplans` ( `polygon` ) VALUES ( GEOMFROMTEXT( 'POLYGON( (39.593254951279626 -119.2415714263916, 39.596231192849004 ...
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57 views

Read GPS Coordinates into LineString from Table

I found this beautiful piece of code which takes a linestring and I can get the points from it: DECLARE @GeographyToConvert geography SET @GeographyToConvert = ...
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2answers
96 views

How to create a custom map report

not sure if this is the right forum. But just wondering is there a way one can make a map report out of an image or a map made on excel. I have the data and I've looked around and found that its ...
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2answers
340 views

Over 99 million records with geography column & spatial index - VERY VERY VERY slow queries!

I’ve been working with SQL Server for a long time but have only recently encountered the need to work with spatial data. I have come into an environment that uses it pretty heavily and my first real ...
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1answer
63 views

What is the point of a SRID in a geometry type?

From my understanding, SRID is a projection code; how the 2d coordinate system is fit over a spheroid. The difference between Geometry and Geography types, from my understanding, is that a geometry ...
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1answer
167 views

Non-overlapping rectangles constrained to a boundary

I am trying to model placement of parts on a circuit board. Without any meaningful constraints, my basic schema looks like this: create table part ( part_id bigserial primary key, name text ...
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126 views

In Oracle, when you update an SDO_GEOMETRY column with the same value is the MDSYS SPATIAL_INDEX updated?

Because generating and updating a spatial field is relatively expensive we want to avoid it when possible. Here is the relevant bit of our schema: +---------+---------------+ |LATITUDE ...
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32 views

MySQL 5.6 or 5.7 sharding geospatial data

I have ran into a problem where I need to start to scale horizontally. With my database I am performing only nearest point searches with my data. So from a lat/long inoput I find all the nearest ...
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1answer
28 views

Can SSRS XML data sources contain spatial data?

I've been given the task of producing a report which will extract data from a web service. The web service provides data from a list of sites including aggregates. Lets say total sales by month. ...
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71 views

Spatialite: use of virtual spatial index for distances

I'm currently learning to use spatial access methods for query optimization. I'm going through the examples in spatialite cookbook and got stuck in here ...
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1answer
219 views

Triggers on Insert or Update SQL Server (Spatial)

I am looking at creating a trigger on a live SQL Server spatial table that will update a column when a user either: Creates a new feature Updates the geometry of a feature in a GIS application ...
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1answer
190 views

How to optimize a query so that it seeks on one index first, and then another index after that

I have two sets of earth measurements from satellite data, each with time fields (mjd for mean julian date) and geography positions (GeoPoint, spacial) and I'm looking for coincidences between the two ...
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0answers
116 views

rt_raster_to_gdal: Could not load the output GDAL driver

I have already set the environment in windows SET postgis.gdal_enabled_drivers = 'ENABLE_ALL'; Even I tried by adding following in environment path- POSTGIS_GDAL_ENABLED_DRIVERS=ENABLE_ALL But ...
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2answers
13k views

What's the difference between POINT(X,Y) and GeomFromText(“POINT(X Y)”)?

I'd like to store some geometric positions in my MySQL database. For this I use the POINT datatype. Almost everywhere I read that the function GeomFromText should be used to insert data in the table. ...
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2answers
84 views

Geo localized database RTREE

I'm using MYSQL V5.6.24 GPL I have a database with 200K rows and growing and I'm trying to get the nearest, based on points. I have all the database in InooDB, and to use Spatial data, I create one ...
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1answer
100 views

How can I improve this update?

I'm working with SQL Server 2014 Express edition and I want to upload some OpenStreetMaps data. Data is a 172 Mb XML and it loads ok. The problem is with this script: UPDATE ways SET geog4326 = ...
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2answers
974 views

Error updating sql server geography type in trigger

I have the following trigger in my database: CREATE TRIGGER dbo.triggerGeocodedAddressUpdate ON dbo.Party AFTER UPDATE AS IF UPDATE(Latitude) UPDATE pt SET pt.GeocodedAddress = ...
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1answer
87 views

very poor cardinality estimate on a geometry intersection

I'm intersecting a point with a set of polygons. The query is indexed, and the polygons do not overlap but the query plan seems to think that instead of 1 row, i'll return 18k rows, and this results ...
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2k views

Storing latitude and longitude

I know there are similar questions on here that have been answered but unfortunately none of them work for me. I am hacking my way through creating a page which will display multiple locations on a ...