Questions tagged [mysql]
MySQL is an open-source, relational database management system. Place you question on MySQL Spatial Extensions here.
255
questions
1
vote
0answers
32 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
18 views
Showing geometry from MySQL table on standalone QGIS application
I am using below code to connect the MySQL table on a QGIS based standalone application. I am using QGIS 2.7 and MySQL 5.7 version.
uri="MySQL:mysql,host=localhost,port=3306,user=root,password=...
0
votes
0answers
25 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
17 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
48 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 ...
0
votes
0answers
76 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 ...
1
vote
1answer
68 views
MySQL 5.7 and how to store WGS 84 Coordinates
I want to store WGS84 coordinates in a MySQL 5.7 database. After much reading, I think I should use the POINT datatype with a SPATIAL INDEX. But I am very confused about SRSs, SRIDs, lat/long vs long/...
0
votes
1answer
65 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
72 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
96 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 ...
0
votes
0answers
11 views
Selecting routes in MySQL table that intersect with a given bounding box?
I have a MySQL table, that stores routes. The table stores the NorthEast and SouthWest coordinates of the route bounding box as POINT type. Also it stores 10 key coordinates along the route as a ...
1
vote
0answers
34 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
25 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 ...
0
votes
0answers
11 views
showing GeoJSON result on googlemap [duplicate]
I want to get some point (in Geometry type) from my sql database with AJAX and show them on googlemap
my table name is location_flat which has a column named position conatained my geometry points.
...
0
votes
0answers
133 views
MySQL Query for Getting Records within Radius
Coordinates in the table are stored in 3 separate columns x, y and zone and are formatted in UTM.
Here is the idea: I get the current position of the user (in lat long but I can convert it to UTM if ...
0
votes
0answers
138 views
Extract data table with extended description from Google MyMaps
I would like to extract data table from Google MyMaps and make it usable i.e in Excel.
The issue is straightforward at first glance. I know, that I must download the map in .kml and convert it, as per ...
1
vote
1answer
93 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
0answers
62 views
MySQL update geometry field
I have MySQL database with table in
X varchar(50) latin1_swedish_ci No None Change Change Drop Drop
More More
11 Y varchar(50) latin1_swedish_ci No None ...
0
votes
1answer
98 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
105 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
310 views
How to save marker and polyline in database?
I want to store marker and polyline in the database. In this script, I have 3 functions, that is to draw a polyline, marker and the point of destination.
Can anyone fix my script below?
var map;
var ...
0
votes
0answers
305 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
99 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
1answer
181 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
364 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
66 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 ...
2
votes
0answers
606 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
0answers
62 views
MySQL Query for Google Map Developer
Need your advice, i have used Google Map API for my WEB site based on MySQL database,
I would like to know if MySQL Query can be implemented on Google Map API's. So it would display marker based on ...
0
votes
1answer
354 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
0answers
135 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
822 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
862 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
378 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
669 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....
0
votes
1answer
236 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
351 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
117 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
97 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
0answers
303 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
231 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 ...
1
vote
1answer
300 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 -...
1
vote
0answers
1k views
Parsing GeoJSON in PHP?
i am trying to parse GeoJson from database with php but somehow i got an error and i cannot found any error in my script. here my script
$id = 1;
$db = new mysqli("localhost","root","","skriboo");
$...
0
votes
1answer
606 views
MySQL GPS distance calculation is failing
MySQL 5.6 here. I'm storing GPS coordinates as MySQL Point types in my DB and am trying to build a query that takes a single GPS coordinate (consisting of latitude and longitude components) and ...
2
votes
1answer
198 views
Lost geometry from QGIS mysql vector layer
I have a vector layer displaying geometry from a mysql view.
This works fine for several days/weeks until suddenly it fails to refresh and my layer reverts to a non-geometry table, losing all symbols,...
1
vote
0answers
41 views
ArcGIS Near equivalent in MySQL?
I am trying to replicate a process in MySQL that I have had been through in ArcGIS thereby using MySQL to set up an automated system for extracting future climate predictions from downscaled data to ...
0
votes
0answers
604 views
MySQL GeoJSON query for polygons format error
Trying to take MySQL polygons to GeoJSON. My SQL query is Okay and works in PhpMyAdmin and I'm trying to modify some code that works for points. I think I'm close but stuck.
In PhpMyAdmin the ...
15
votes
1answer
2k views
Where does the default Earth radius in ST_Distance_Sphere come from?
MySQL says in the docs for ST_Distance_Sphere
Calculations use a spherical earth and a configurable radius. The optional radius argument should be given in meters. If omitted, the default radius is ...
6
votes
0answers
152 views
Position of vehicles relative to lead vehicle
I have a set of vehicles (think railway) that are in a (semi)fixed formation. I know the lead vehicle and I know the GPS coordinates of the lead vehicle at any given time. Sometimes, I can rely on the ...
1
vote
1answer
2k views
Correct method to save and restore leaftlet drawing into mysql database
I have the following code for saving my coordinates of what I draw. So what I do on drawing created I have the following function.
map.on(L.Draw.Event.CREATED, function (e) {
var type = e....
2
votes
0answers
400 views
Overpass API python wrapper to run requests on the endpoint of overpass-turbo
we have with Overpass API python wrapper a thin Python wrapper around the OpenStreetMap Overpass API https://github.com/mvexel/overpass-api-python-wrapper
we have some Simple example:
import ...
