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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PostgreSQL : Is this because of locks(row level)?

I have a table with approximately 2.1 million tuples. Which has latitude and longitude columns. I am trying to convert this into a geographic type (point with SRID). The function(procedure) I have ...
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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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3k views

What is best way to storing geo coordinates related to planned route?

Here is my scenario: Application "A" produces lat and long points that correspond to planned route. Depending on route distance it could have several thousands of points. I know of Geography and ...
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1k views

$nearSphere returns too many data. What am I missing? Am I wrong? Is it a bug? Does other see the same thing?

I noticed that $near and $nearSphere returns completely different data and I got suspicious. After all, when latitude is near equator it sphere distance shouldn't differ a lot from euclidean distance. ...
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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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44 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
393 views

how to design a database's table to store mysql spatial data in a parent child relation?

I want to store locations and polygon data in a parent-child relationship. I am using spatial data in MySQL and Google maps for polygon. Examples: 1. World 1.1 US 1.2 China 1.3 Japan 1.4 South ...
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1answer
55 views

Column not found in dbase file

When I try to import a shapefile using db2se, I specify the input columns to be loaded in the syntax as the COLUMN NAME db2se import_shape <dbname> -userId <username> -pw <password> ...
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2answers
141 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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1answer
40 views

Multi-master synching in three geographically separate datacentres

Our company needs to create an application that operates in all parts of the world. We are looking to have three servers (one in Europe, one in Asia and one in America). I'm looking to use ...
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1answer
79 views

Spatial Index ignored when using additional non-spatial conditions

Why does SQL Server ignore my spatial index when I use additional conditions? If I add an INDEX hint it will use the correct index, and runs a lot faster. I would like to avoid using the hint if ...
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1answer
2k views

MySQL Syntax - Searching points within polygons using GeomFromText

I am trying to select points within polygons using the GIS/spatial extensions for MySQL. I'm fairly new to this, so bear with me if this is an elementary question. I have points defined as text ...
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133 views

Spatial Loader DB2 giving error while importing shape file

While I am trying to import a shapefile using db2se import_shape file utility, db2se import_shape <dbname> -userId <userid> -pw <password> -fileName ...
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1answer
1k views

Spatial Index on an InnoDB table

I have a database which is in InnoDB, because I wanted consistency (cascading delete). Now, I want to use spatial indexes for selecting rows ordered by geometric distance. However, spatial indexes ...
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1answer
1k views

GeomFromText in trigger has error

I have this trigger: DELIMITER $$ CREATE TRIGGER geometrytrigger BEFORE INSERT ON users FOR EACH ROW BEGIN SET NEW.user_geometry=GeomFromText(NEW.user_geometry); END$$ DELIMITER ; when I insert a ...
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1answer
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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1answer
217 views

What is the SQL command to get 20 closest points from some center location

There are 1.6 million rows. Must not compute distance for all rows. Spatial index is available This is the table structure. The name of the table is businessauxiliary. So yes I used MyIsam, added ...
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1answer
3k views

Repair with keycache in mysql runs EVERY time. Can't even log why it's happening

I have a MyISAM table w/ ~1million rows and two indexes - one's a three-column key, and the other is a spatial index for bounded SELECT statements on a separate point column. My insert statements ...
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19 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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21 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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111 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
531 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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94 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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414 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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111 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 ...
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54 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 ...
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167 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 ...
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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 ...
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126 views

PostGIS - Effects of polygons with large number of verticies [closed]

I have a large table that stores, among other attributes, a geometry type. I have a GIST index on this attribute. However, when I perform even the most basic queries [say, select count(*) from table ...
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63 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 ...
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256 views

PostGIS: Remove stale/obsolete geometry columns from the geometry_columns table [closed]

I understand that the function Populate_Geometry_Columns() inserts records in the geometry_columns table for geometry columns that are not yet listed there. However, an invocation of ...
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1answer
187 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
28 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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1answer
197 views

What database do most mobile start ups use? [closed]

mongodb? MySQL? PostgreSQL? If someone would add pluses and minus, let me know. Why I ask: I am a mobile startup. I need a database that supports spatial indexes. The spatial index must be able to ...
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1answer
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 ...
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1answer
197 views

MongoDB Benchmark with write-intensive on geo-indexed DB

I am using PostgreSQL 9.3 on AWS RDS to store geo information into an indexed table of points. My data is write-oriented, meaning that I write nearly 1,000 points per each geo search query. I am ...
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2answers
886 views

migrate SQL Server geography data to PostGIS geometry data

I'm trying to use SSIS to transfer point data from a Geography column in SQL Server 2008 R2 to a geometry column in a Greenplum (Postgres 8.2.15) database with PostGIS. I know there's a way to do the ...
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2answers
1k views

How do I get spatial index feature if I mainly use innodb?

My current strategy is to create another table in myisam that contains those spacial information. Then if I want to find 20 closest business, I'll just use join. Is this a good idea?
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105 views

Find the closest bar, when searching for a drink

Problem: Find the closest bar that serves the drink(s) I'm looking for. Here you can find the generated MySQL code http://pastebin.com/5Uc2ewUW The API Request that interacts with this problem ...
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1answer
75 views

STDisjoint() = not STIntersects()?

In short, are STDisjoint() and STIntersects() antipodes of each other? According to the documentation, it seems that they are. But there is no explicit note about it. Are there any tricks? Which one ...
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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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1answer
16 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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366 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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23 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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0answers
110 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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27 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
27 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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193 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 ...
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1answer
61 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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1answer
41 views

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 ...