Questions tagged [mysql]
MySQL is an open-source, relational database management system. Place you question on MySQL Spatial Extensions here.
262
questions
-1
votes
0answers
18 views
Problem with connecting QGIS to MySQL Server [closed]
I am using QGIS 3.16.5 on MacOSx Catalina and can't connect to a MySQL database. MySQL does not appear in the dropdown menus.
Has this functionality been discontinued?
0
votes
0answers
40 views
QGIS is not displaying geometry features for MySQL table
I'm currently working in a MySQL database version 5.7. I've a polygon table that was created using the following way:
CREATE TABLE coords(
ref_geo CHAR(80) NOT NULL,
geom GEOMETRY NOT NULL
);
I ...
0
votes
0answers
27 views
Why are points from a MySQL WMS layer, displayed on a OpenLayers 2 map, reading out a lat/long location that is off by 500 meters,
I have a MySQL table containing MySQL point geometries (MySQL 5.7). I have configured a GeoServer WMS layer using this data. I cannot set the native srs (not enabled in config dialog), declared srs is ...
0
votes
0answers
24 views
Migrate MySQL spatial DB/tables to PostgreSQL
We have a web system that uses MySQL spatial databases. We want to migrate from MySQL to PostgreSQL. I've been looking for methods to do it. I have found some tools that help you to migrate. However ...
0
votes
0answers
20 views
How to determine if a person is on the line or distance from it
There is a base table with the following structure:
id - AUTO_INCREMENT
name_hotel - varchar
coordinates - multilinestring
The coordinates form a line
In the database, it is written like this:
'...
0
votes
0answers
70 views
Saving polygon coordinates into MySQL
I am currently building a housing complex mapping in my regency with PHP, Leaflet.draw and MySQL to store the data.
My problem is, how to save the polygon coordinates into MySQL?
I am extremely new to ...
0
votes
1answer
342 views
Saving data of Leaflet Draw using PHP into MySQL
How do I insert Leaflet Draw coordinates in the MySQL database with id longitude-latitude columns?
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8&...
0
votes
1answer
23 views
Accessing x and y coordinates of a POLYGON in MySQL
In my database. I have a spatial column called coordinates which is of datatype POLYGON. so for example. The lunch room has coordinates POLYGON(0 2, 1 2, 3 2, 5 2, 0 2). That's just a hypothetical ...
1
vote
1answer
62 views
Extract top, bottom, left, and right (as numeric values) from a polygon in MariaDB?
Is there a way to extract the minimum and maximum x and y values separately from a polygon value in MariaDB (I'm using 10.5.8 with no extensions)?
Eg:
set @poly = ST_GeomFromText('POLYGON((1.2 1.2,2 1,...
0
votes
0answers
15 views
Checking location in which polygon
I have KML file for country polygon.
I can read the KML file in PHP and see all boundaries.
What I want now is when I put a marker on point showing me the title of the polygon.
Does anyone have any ...
1
vote
0answers
177 views
MySQL performance issue with ST_Contains not using spatial index
We are having what seems to be a fairly large mysql performance issue on trying to run a fairly simple update statement. We have a table(1.8mil) with houses that contains a Lat+Long geometry point ...
0
votes
1answer
95 views
QGIS MySQL points import
I have a column in my MySQL database table that contains location information (GeoJSON).
I want to import this data and see the points on my QGIS project map but it doesn't seem to work.
What I was ...
1
vote
1answer
44 views
QGIS -> MySQL Updates
I added a MySQL layer containing GeoData to my QGIS 3 project.
I want this layer updated every time the database updates.
Is there a way to do that?
1
vote
1answer
89 views
Convert points to line segment
In MySQL, I have two tables to store GPS trackpoint and second table to store chainage values. Lines can have more than one condition.
I wish to generate line segments by using both tables above.
...
0
votes
1answer
169 views
Sorting by distance in MySQL
I found a sample of code
SELECT *
FROM locator
WHERE SQRT(POW(X(center) - 49.843317 , 2) + POW(Y(center) - 24.026642, 2)) * 100 < radius
in this question Find points within a distance using MySQL....
3
votes
0answers
122 views
Import a layer in MySQL using PyQGIS
I managed to import a layer from a MySQL database in QGIS with PyQGIS.
Now I'm looking to import a layer from QGIS into MySQL.
I explored several ways :
Using ogr2ogr on the command line, the ...
2
votes
2answers
323 views
Loading points from an array given by PHP query from MySQL db to OL
New to OpenLayers and JS in general. I have some coords stored as lat long, then PHP script which load these points from MySQL db and simply print it as follows:
var points = [[49.66356869941062, 16....
1
vote
0answers
41 views
CARTO update existing table from external MySQL database
I would like my Carto data to be updated, using external data (MySQL database, I run and manage locally using PHP scripts), so that the Carto table gets updated with the most recent data, whenever the ...
1
vote
0answers
112 views
Calculating miles between two points using Vincenty formula
I have the following MySQL function:
DELIMITER $$
DROP FUNCTION IF EXISTS `fn_vincenty_distance`$$
CREATE FUNCTION `fn_vincenty_distance` (
lat1 FLOAT, lon1 FLOAT,
lat2 FLOAT, lon2 ...
0
votes
0answers
55 views
Failure to display points from a MySQL table in QGIS
I connected a MySQL table containing points with QGIS.
Adding new records from QGIS works well.
The problem is this: QGIS does not display the points on the map. However QGIS manages to interpret the ...
0
votes
0answers
21 views
No coordinates from GDAL index in MySQL
I have run the gdaltindex command with output to a MySQL table, however only a list of file name are
gdaltindex -lyr_name Source_raster_idx -f MYSQL MySQL:mapDB,host=localhost,user=admin,password=...
1
vote
1answer
343 views
Openlayers: Using PHP and npm
I've got a rather large MySQL database containing polygons (coordinates) and their additional properties (e. g. text labels in different languages). I would like to use PHP to connect to my database ...
2
votes
0answers
2k views
Large GeoJSON file in Leaflet performance issue
I have a large GeoJSON file (now it is about 22MB with 4K polygons but it is going to contains about 10k polygons)
I load the file in Leaflet using L.GeoJSON.AJAX, on each feature I attach two ...
0
votes
1answer
393 views
QGIS is not showing/rendering points that are present in MySQL server
I have a MySQL database in which there are auto generated points almost 1000 created via Laravel (PHP framework) it has a very simple schema as shown below. I just want to visualise them on an ...
1
vote
1answer
876 views
Need to connect to MySQL or MariaDB databases in QGIS 3.4+
I need to connect to MySQL/MariaDB database tables where my geographic data is stored. I used to be able to do this in earlier versions of QGIS, but that option disappeared ~ QGIS 2.14. Are there any ...
1
vote
0answers
446 views
ST_Latitude and ST_Longitude functions do not return exact values in MySQL [closed]
I tried to collaborate on this question from the Stack Overflow site.
The ST_Latitude and ST_Longitude functions (equal ST_X and ST_Y) of MySQL (version 8.0.17) returns a non-exact value for certain ...
1
vote
0answers
55 views
Display all trajectories location along with dummy location
I'm trying to display the all trajectory location on Google map along with dummy location. I have tried to display dummy locations with sample location and it works fine, but when I try to connect to ...
1
vote
0answers
38 views
Multiple layer data in one delimited text layer
I am a GIS beginner.
I'm exporting several point coords from a Mysql database, and importing into QGIS using delimited text layer.
I need to plot all the points and set the symbology to distinguish ...
1
vote
1answer
546 views
How to make query of MySQL connection in QGIS?
i have added a connection with a MySQL database in QGIS
(Add vector layer - Database - MySQL).
Is there an option to make a query over the database in QGIS?
0
votes
1answer
361 views
ArcCatalog connecting to MySQL DB [closed]
Looking to connect to MySQL DB from ArcCatalog.
As of now I have ArcCatalog 10.5 running on machine 1.
I have a MySQL 8 instance running on machine 2 (server).
I am able to connect to machine 2 from ...
1
vote
2answers
252 views
MySQL, geoPHP, select sites near the current site
I'm working with archaeological sites, stored as polygons in a MariaDB 10.3 table, and I have PHP 7.2 with GEOS and geoPHP available. I'm creating a page that displays all the related information for ...
0
votes
0answers
418 views
Query and display MySQL DB data from HTML
I want to link MySQL DB to the HTML and get the data according to the query below.
SELECT * FROM feature1 WHERE place = 'feature2'
php seems one of the way to do this, since I am one day old with ...
0
votes
1answer
210 views
MySQL spatial slowed after upgrade to 8
After I updated MySQL from 5.7 to 8, spatial functions have become very slow. Specifically, this query:
SELECT points3_.track_id AS track_id
FROM waypoint points3_
WHERE ST_CONTAINS(ST_POLYFROMTEXT(...
0
votes
2answers
416 views
Unable to save point features to QGIS on MySQL database
I created a table with point geometry in MySQL. Subsequently added a vector layer from MySQL table. The table could be accessed from QGIS. However on pressing the add button the system threw warning ...
1
vote
0answers
1k views
How to insert a Polygon into MySQL database Table?
I have shapefiles which I converted to .csv format. I want to insert those into a MySQL Database table. I used ST_PolyFromText according to the MySQL reference manual.
## create table
cur.execute("...
1
vote
1answer
204 views
Can't get the correct geometry values after MySQL querying
I have large points data and also a small bounding boxes. I want all the points present within this bounding boxes.
With the extent of the bbox , I want to get all the points within this bbox.
With ...
4
votes
0answers
2k views
Find all points near a point within a radius MySql 8.0 (SRID 4326)
This question is targeted to MySQL 8.0 with its new spatial features.
Given the following table:
CREATE TABLE `places` (
`id` INT(11) UNSIGNED NOT NULL,
`location` POINT NOT NULL SRID 4326,
...
0
votes
1answer
1k views
Check whether a point is inside a polygon or not in MySQL
I am trying to get the points those are within the shapefile. I have tried the Spatial functions and it's showing an error:
3033 - Binary geometry function st_contains given two geometries of ...
1
vote
1answer
249 views
Result of ST_Contains gives false positive
I am trying to figure out the state that Berlin is in. So now my query SELECT * FROM states WHERE ST_Contains(Geo, Point(13.383068, 52.530644)); return two results. One for Berlin which is correct, ...
0
votes
1answer
2k views
Automatically refresh Leaflet Markers from MySQL
I have a leaflet map that loads marker details from a MySQL database. I have a timer that clears and reloads the layers (and therefore markers); however; it doesn't seem to be refreshing the data. ...
3
votes
2answers
2k views
Server side clustering with geohash
I need help with clustering algorithm. I have a mysql database with lat, lng, geohash(12 chars).
I am usign this query to select all records for zoom level 2 (2 chars)
SELECT COUNT( id ) , LEFT( `...
1
vote
0answers
728 views
Find single nearest point of point in mysql
I have an app that formerly used PostgreSQL with PostGIS but now the environment changes and I have to use MySql.
In my app i had a database query that searches the nearest point to a point. Note ...
0
votes
1answer
1k views
Why does mysql ST_WITHIN work for some MultiPolygons but doesn't for others?
The mysql queries are to return all POI's within a certain country.
This works (for Angola):
SELECT
poi.poi_id,
poi.poi_address_full
FROM
poi
WHERE
ST_WITHIN(
poi.poi_point,...
0
votes
1answer
344 views
Spatial functions with MySQL, XAMPP, and Wordpress
I am trying to figure out how to using the ST_AsGeoJSON function in MySQL, but I keep getting an error that says that this function does not exist. I have found in the MySQL documentation that this ...
1
vote
2answers
566 views
MySQL 8 MBRIntersects 10 times slower than PostGIS equivalent
I'm trying to migrate a PostGIS database to MySQL 8 and am having a big performance hit when it comes to MBRIntersects.
Using Mapbox to render vector tiles, I need to extract geometry intersecting ...
1
vote
0answers
192 views
Which approach is faster for getting all POIs from MySQL/MariaDB with PHP/Laravel [closed]
Correct me if I'm wrong.
There are three approaches to get the nearest homes, users have created in my website:
To create a table with two columns(latitude, longitude) that both of them are float ...
1
vote
0answers
111 views
MySQL ST_Contains returning empty recordset?
Using MySQL 5.6, I have converted lat and lng fields into Points - using AsText, I can see this is OK.
I have another table to hold the polygon data, and again using AsText, I can see the correct ...
2
votes
1answer
543 views
Storing Shapely polygons in MySQL
I have to store some polygons in a MySQL database. The polygons are in Plate Carrée (ESPG 32662) projection, but I also tried to first converting them to the usual latitude-longitude projection (ESPG ...
0
votes
1answer
447 views
TurfJS + PHP + MySQL
I have a PHP endpoint/service that receives Lat/Long data from a 3rd party. The data is then processed in PHP code and saved into a MySQL database. This process works fine without any issues.
I need ...
2
votes
1answer
459 views
Importing shapefile to SQL database, attributes are all NULL
I used ogr2ogr to import a shapefile into a MySQL database using the following:
ogr2ogr MYSQL:"db,host=localhost,user=root" -nln "map" -a_srs "EPSG:4683" map.shp -overwrite -addfields -...
