Questions tagged [spatial]
Storing, querying, and indexing spatial data (including geometric and geographic representations).
237
questions
2
votes
1answer
44 views
Best indexing strategy for spatial join and ranged lookup
Context
We have two tables (not the real tables used in the examples below. They are from a toy DB im using for testing):
Incidents_2 (Columns of interest are a geom, and a reported_at (int8))
...
2
votes
1answer
47 views
How to add Spatial Reference ID 28992 to MSSQL server?
I want to use Spatial Reference ID 28992, as found on EPSG, in MS SQL Server. How can I add this to MS SQL Server?
My end goal is to get this dataset into MS SQL Server, with the Geography Markup ...
0
votes
0answers
21 views
MySQL 8 - Optimize query using ST_Contains or ST_Within
I have a table called locations with ~70000 records which includes a geometry column of points and a spatial index as follows:
UPDATE locations SET geom = ST_GeomFromText(CONCAT( 'POINT(', latitude, '...
0
votes
0answers
16 views
PostGIS buffer in miles not lat/long degrees
I am trying to take two points, add a buffer around them (in meters), draw a line between them, draw a buffer around that, and then query whether items are inside the area of the circles expanded line ...
1
vote
1answer
27 views
How to move geographical data from MS Access to SQL Server
For 20 years I've been working with MS Access, with much VBA involved.
I have a lot of geographical data in Access and I'm preparing to move to SQL Server because it supports geographical data types, ...
0
votes
0answers
41 views
In 8.0.17 EPSG Spatial reference systems are not available at installation? [duplicate]
In 8.0.17 INFORMATION_SCHEMA.ST_SPATIAL_REFERENCE_SYSTEMS is not prepopulated with ORGANIZATION="EPSG" records, leaving the table with only a single record, that for the default SRID=0.
A count in ...
0
votes
0answers
29 views
Mysql8 ST_GeomFromGeoJSON(geo_json) throws error Longitude -180.000000 is out of range in function st_geomfromgeojson
I have a table with polygons stored as geojson.
CREATE TABLE `location_boundaries` (
`id` INT UNSIGNED NOT NULL,
`name` VARCHAR(255) NULL DEFAULT NULL COLLATE 'utf8mb4_unicode_ci',
`...
1
vote
2answers
42 views
MySQL 8 not using Spatial Index?
I have an issue where whatever I do I cannot get MySQL to use a spatial index.
A query like the following then takes 5 seconds!
Any way to force this to use the index at all?
WITH ranked_reports ...
1
vote
0answers
22 views
MySQL 8.0.18 - ST_Area returns invalid value
I have a problem with ST_Area function in MySQL 8.0.16.
The result of the procedure call returns a different result than any library used to calculate the area of a polygon.
Example:
I have a ...
3
votes
3answers
197 views
RDS MySQL 8.0.16 has empty “INFORMATION_SCHEMA.ST_SPATIAL_REFERENCE_SYSTEMS” table
On aws RDS I have an mysql 8.0.16 instance running.
My problem is now, that the INFORMATION_SCHEMA.ST_SPATIAL_REFERENCE_SYSTEMS table is empty.
This is a problem for me because I would like to create ...
6
votes
1answer
219 views
MSSQL Geography STIntersects returns 1 when 0 is expected
I'm experiencing an MSSQL Geography issue I can't explain. Assume that I'm math-challenged, but it seems like the following point should NOT intersect the following polygon:
DECLARE @t_point ...
0
votes
0answers
47 views
Visualization Of Graph Data With Spital Drawing SSMS
I want to create a visualization of my graph database utilizing Spatial Drawing within SSMS. How do we connect the various polygons with node names and to from pointers? The layout should preferably ...
1
vote
0answers
19 views
Reducing contiguous values in geographical data to a set of polygons?
I've got a MySQL table with about 200,000 rows in it. The table has four columns, lat, lng, and value. value is just a percentage, and represents your chances of seeing an aurora in the night sky for ...
0
votes
1answer
45 views
How to create Polygon from Point datatype in MySQL?
I have a table like this:
CREATE TABLE `aois` (
`aois_id` int(11) NOT NULL DEFAULT '0',
`WS_A` point DEFAULT NULL,
`WS_B` point DEFAULT NULL,
`WS_C` point DEFAULT NULL,
`WS_D` point DEFAULT ...
2
votes
1answer
56 views
Efficient way to store geographical routes in MongoDB
I need to store a taxi route into MongoDB, however I'm not sure what is the best way to do this.
Since the route is only needed for the taxi order, the first idea I had is to store it in the order, ...
0
votes
1answer
236 views
Sharding a MongoDB instance by a spatial key and a date
This may be more an advice than anything else, but I'm designing an app that stores in a table objects that have a 2dsphere index and they also have a date (+time), both of them being part of queries ...
0
votes
1answer
42 views
Oracle GIS database replacement [closed]
My company has a huge (hundreds of millions of records) Oracle database of GIS/temporal information. We are trying to switch to an open source alternative.
If it helps, we imagined the following ...
2
votes
1answer
624 views
RDS: permission denied for relation spatial_ref_sys when copying
I am copying tables using ogr2ogr from Oracle to PostGIS. When I run try to load these I get,
ERROR 1: ERROR: permission denied for relation spatial_ref_sys when copying <table>@AWS
3
votes
1answer
406 views
Mysql 8 ST_GeomFromText giving error Latitude out of range in function st_geomfromtext. It must be within [-90.000000, 90.000000]
I am trying the following insert query on mysql 8.
Insert Into fence Set
fenceName='aa',
radius=2,
fenceGeometry=ST_GeomFromText('POINT(...
0
votes
0answers
40 views
How to create an Index on a raster column?
In a PostGIS enabled DB, I have a 1.7GB table with a raster column rast. I need to create an index on that column in order to speed up my raster queries.
I have tried the following:
CREATE INDEX ...
6
votes
1answer
115 views
How do I force SQL Server to use my spatial index through a view?
I have tables which holds transactions for properties that are stored as lat long pairs. (There are more columns and datapoints then in my example schema).
A common request is to find the ...
0
votes
1answer
105 views
Spatial Query using MySQL 8.0
I have a database in MySQL 5.7 where I create a Lat/Long column using "POINT", then I create a Index on this column with main key as second column. So my database is like
PID, SurveyID, GeoPoint
...
1
vote
1answer
51 views
Can I restrict a SQL Server spatial field to hold values of specified spatial types and SRIDs?
I am trying to understand geography data types so I can integrate my database more closely with GIS processes. From my reading, it appears that a geography field can hold many different types of ...
1
vote
1answer
55 views
Filtering a MySQL table on multiple columns, including one with spatial data
I have a MySQL table with linestrings:
CREATE TABLE edges (
id int(11) unsigned NOT NULL AUTO_INCREMENT,
geometry linestring NOT NULL,
type_key varchar(255) NOT NULL,
created_at datetime NOT ...
1
vote
1answer
64 views
SDO_NN the second nearest neighbor
Oracle SQL geometry allows me to find the nearest neighbor using
SDO_NN(neighbors.GEOLOC,p.GEOLOC,'SDO_NUM_RES=1 UNIT = MILE',1) = 'TRUE')
How can I get the select the second nearest point?
1
vote
0answers
42 views
Spatial index unused on nested set
I'm using the nested set architecture to store URL hierarchies in the following InnoDB table on MySQL 5.7. From my research, I've learnt that using a SPATIAL index will significantly speed up any ...
1
vote
1answer
55 views
SQL to find nearest location in one table from locations in another
I have a table like this, that contains a few million locations (POINT):
CREATE TABLE NewLocations(
[NewName] [varchar](20),
[NewLocation] [geometry]
)
I have another table like this, that ...
1
vote
1answer
219 views
MSSQL Spatial performance (point in polygon)
Discolsure: This is a cross post from GIS, however the group over there isn't necessarily focused
I have a query, below, that works - however its very slow, looping through roughly 24,000 points per ...
2
votes
1answer
148 views
Is it possible to add a spatial index to a partition with Postgres 10?
I am creating declarative partitions like:
CREATE TABLE mydata.my_features (
id bigint,
my_feature1 character(1),
my_feature2 integer,
...
my_geom geometry
) PARTITION BY ...
0
votes
1answer
116 views
Does MySQL or MariaDB support a LineString constructor that takes points?
It seems with MySQL and MariaDB I'm getting the following when I try to use the LineString constructor. In PostGIS I can do this with ST_MakeLine(pt1,pt2)
> SELECT ST_MakeLine(Point(0,0), Point(0,...
0
votes
0answers
100 views
SQL Server - Cannot reorganize index on “extended_index” table
I have a maintenance plan that includes an index reorganization step. I am getting the following error in the job history:
Executing the query "ALTER INDEX [SpatialIndex-20180705-165942] ON [dbo......
2
votes
1answer
860 views
Longitude and Latitude order with ST_X, and ST_Y on SRID 4326
I have a MySQL 8.0.15 and I am experimenting with the geo-spatial location functions. I have applied SRID 4326 to the "loc" column.
Nothing in the docs other than the primitive Point() suggests the ...
1
vote
1answer
204 views
How to group-by to get MultiPoint/GeometryCollection in MySQL?
I have a table x like this:
Columns:
SubjectID int(11)
Timestamp bigint(20)
fix_geom point
When i try to group my fix_geom column to a MultiPoint (or GeometryCollection) by SubjectID, like:
...
0
votes
1answer
76 views
Do the type-specific WKT- constructors function differently from ST_GeomFromText?
From the docs on MariaDB, for ST_LineStringFromText
Constructs a LINESTRING value using its WKT representation and SRID.
ST_LineFromText(), ST_LineStringFromText(), ST_LineFromText() and ...
0
votes
1answer
168 views
How do I construct a LINESTRING by aggregating Points (ST_MakeLine) in MariaDB?
Let's say I have a table with 3 points,
CREATE TABLE foo ( id int PRIMARY KEY, geog point );
INSERT INTO foo (id, geog) VALUES
( 1, Point(0,0) ),
( 2, Point(1,1) ),
( 3, Point(2,2) );
How can ...
2
votes
1answer
645 views
ERROR: invalid GeoJson representation
the GeoJSON Spec show,
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [125.6, 10.1]
},
"properties": {
"name": "Dinagat Islands"
}
}
But when I wrap that in ...
1
vote
1answer
475 views
MySQL 8 Geospatial Queries, MakeEnvelope Workaround?
I'm trying to work with some data from Google Maps and have a few locations along with their bounding boxs (northeast, southwest) data stored.
Using that data, I have the following query...
SELECT
...
0
votes
1answer
287 views
How do you create a Geographic Point with MariaDB and MySQL?
PostGIS provides a simple cast to construct a geography type from floating point lat, and long
SELECT ST_Point(1,2)::geography; -- standard version (MM) less precision
SELECT ST_MakePoint(1,2)::...
0
votes
1answer
353 views
Does HBase support spatial functionality?
I see mention for spatial functional in HBase. For example "HBaseSpatial: A Scalable Spatial Data Storage Based on HBase".
What spatial functionality does HBase support and where is this documented?
1
vote
2answers
83 views
Joining relations based on distance between geometry columns?
I have two tables:
User(id)
Region(id, userID, origin Geometry('point'), radius))
User has a one-to-one relationship with Region.
I want to query all users that have a region that contains a point (...
1
vote
2answers
214 views
Testing Geometry Polygon Data is Valid Using a Stored Procedure
We are using a SQL Server Spatial database with the following table setup:
SRID of 27700
geometry_column of ogr_geometry
geometry_type of POLYGON
I am using a SQL Server stored procedure to perform ...
3
votes
1answer
267 views
How can I search for all points with a specific range (radius) of another point?
The syntax I use to query for polygons in range of other Points
SELECT *
FROM dbo.myTable
INNER JOIN
dbo.myPOI ON myTable.geog.STIntersects(myPOI.geog) = 1
But, to query points of interests, ...
1
vote
2answers
169 views
How can I use Spatial Indexes for timestamps (non-spatial 1d data)?
I'm using MySQL 8.0. I have some table containing TIMESTAMP column and I need to select within TIMESTAMP range:
SELECT *
FROM t_tbl
WHERE ts BETWEEN @someDate1 AND @someDate2
I want to make this ...
1
vote
1answer
66 views
MBRCovers return true even though point outside the polygon
I'm having big trouble figuring out why the MBRCovers is returning true even tough the point I give as a parameter is outside the polygone supplied.
The point is to find if a row has it's coordinates ...
3
votes
1answer
304 views
PostgreSQL Geo Spatial Query is slow
After given up with MySQL i have tried Elasticsearch and now wan't to see if I could go with PostgreSQL/PostGIS that could allow me to go with PostgreSQL only.
I need to fetch records from a Table ...
0
votes
1answer
458 views
What does MBRContains and MBRWithin test? What does “contains” and “within” mean?
MBRContains(g1, g2) is defined as,
Returns 1 or 0 to indicate whether the minimum bounding rectangle of g1 contains the minimum bounding rectangle of g2. This tests the opposite relationship as ...
5
votes
1answer
749 views
Does MySQL or MariaDB support GIS KNN Index Queries (k-nearest neighbors)?
Can you do k-nearest neighbors algorithm (k-NN) queries on MySQL for example, to find the nearest point in PostgreSQL with PostGIS, I can run a kNN query on the spatial index with <->
SELECT ...
7
votes
4answers
2k views
MySQL Geo Spatial Query is very slow although index is used
I need to fetch records from a InnoDb Table by distance (must not be exactly) and sort by distance.
The table has 10 million records.
My best time is so far 8 sec (3 sec without order by distance), ...
2
votes
1answer
2k views
How do I create a point with an SRID in MySQL?
MySQL supports using ST_PointFromText to construct a point with an SRID,
ST_PointFromText(wkt[, srid [, options]])
Constructs a Point value using its WKT representation and SRID.
This ...
2
votes
2answers
693 views
Search for rows with coordinates within a Polyline
I'm stuck with the logic of a MySQL query where I need to find if a row exists where:
The column longitude and latitude are within a Polyline
The column hit is duplicated within the last month
I've ...
