Questions tagged [multipoint]
is a collection of points, which groups multiple simple points geometries into sets.
60
questions
1
vote
1answer
33 views
Building GEE timeseries for multiple locations
I want to build a timeseries chart for multiple points.
Is it possible to use ui.Chart.image.series and have different lines for different points?
They are not regions, so I don't think ....
4
votes
1answer
67 views
Using R to count number of pixels in raster file for which there are at least one point object present
I am trying to count the number of pixels in a raster file for which there are at least one point object present in R. I think this would be easy but I haven't been able to figure it out.
I am new to ...
1
vote
1answer
24 views
Distinguish between point and any other spatial type
When running an ST_INTERSECTION query on two linestrings in PostGIS, I expect it to return a point (e.g. 'POINT(1 2)'). This works 99,99 % of the time. However, sometimes (for whatever reason), my ...
0
votes
0answers
24 views
how to dervive co-ordinates of points from a Multipoint shapefile [duplicate]
i have a point shape that i extracted from a polygon and now i want to get the co-ordinates of those points before using them to create a convex hull. do anyone know how i can get the co-ordinates in ...
0
votes
1answer
21 views
Transfer raster values into point shapefile in Google Earth Engine
I have a shapefile of points and I want to transfer the pixel values of a collection in GEE (e.g. Sentinel-2 max NDVI) to the corresponding points.
With polygons it seems that this can be done with a ...
1
vote
3answers
191 views
Snapping points outside a polygon to the polygons in R
I have records of where certain species breed on mainland New Zealand and I want to model where these tend to be. However, partly due to some projection errors, as well as potential measurement errors,...
0
votes
0answers
10 views
Optimizing route distances between multiple start and end points (ORS A.K.A OSM) [QGIS 3]
I am trying to optimize the route between multiple start and end points, meaning the total number of routes to be calculated is in the order of around 10.000. I have tried the ORS plugin, which ...
2
votes
1answer
57 views
Extracting a Point from MuItipoint and use it for a ST_DWithin query
I have a MultiPoint geometry column which has only one point (DB is a live server which cannot be changed now).
I need to find all points within a certain distance from a fixed point I provide to the ...
1
vote
1answer
59 views
Geocoding several addresses to Multipoint geometry
I have a csv-file of different companies, see sketch below. Each company has at least one address. Some can have more than 50 addresses. There is one address per cell. In total my csv-file has around ...
0
votes
1answer
154 views
Create polygons from points with rectangular buffer in Python [closed]
I want to create rectangular polygons from points. Actually I have a GeoPandas point DataFrame and the distance in X & Y direction to form the polygon. The distances are equal for every point. I ...
1
vote
0answers
39 views
Truncated time series table output over multiple polygons using Google Earth Engine
I'm facing issue to export a CSV table of a time series from multiple polygons in GEE. Using few polygons it works well, but when I'm adding more polygons, the output is truncated. My CSV has Polygon'...
0
votes
2answers
245 views
Rasterize multipoint geometry in R
I would like to rasterize data on protected areas for certain countries (e.g. https://www.protectedplanet.net/country/TH, download button is at the bottom of the page). The dataset contains two ...
3
votes
3answers
220 views
Plotting a smooth line through a set of geospatial points
I have a number of (long, lat) points as plotted below:
ggplot(data=transect,aes(x=long,y=lat)) +
geom_point( )
I have posted the raw data below. I would like to fit a smooth spatial line through ...
1
vote
0answers
26 views
Minimal Distance Between a geometry and a layer on PostGIS [duplicate]
I am working on PostGIS where I have a two tables.
Let's call them A and B.
A is coming from a multi polygons layer.
B is coming from a multi points layer.
I have created a new column "min_distance" ...
1
vote
2answers
33 views
Converting point to polygon in a given distance
I'm working in QGIS 2.18 but I can work with QGIS 3 or ArcMap 10.2.
I have a multipoint layer providing from a lasDataset where I've isolated the buildings.
I want to create a polygon layer where ...
0
votes
0answers
62 views
Name points inside a feature made with Geometry.MultiPoint
i am trying to name the points inside a feature build with a ee. Geometry.MultiPoint function as shown in the image. This points are alredy named in the imports place. But to build this feature a used ...
0
votes
1answer
54 views
Editing PostGIS multipoint table with QGIS
I created an empty multipoint table in PostGIS and I want to fill it with hand-placed points in QGIS. I have connected them and checked that QGIS identifies the new layer as multipoint. I've got a ...
1
vote
1answer
504 views
MULTIPOINT Text to list of POINT objects
I need to convert a MULTIPOINT string to a list of POINT objects. For example, suppose I have a query with ST_AsText() producing an output that is captured in my_points:
>>>print(my_points)
...
7
votes
4answers
555 views
Displaying multipoint features as polygon using QGIS?
Is there an easy way to show/connect a group of points on a multipoint shapefile layer as if they were a polygon?
I'm collecting points for a plant study, and some of the points are gathered as a ...
3
votes
1answer
753 views
GEE: How to Create a Buffer Around Canny Edges
In google earth engine I've managed to create a layer using the canny edge detection algorithm (which outputs an image). That layer takes on values of 0 or 1. Now I want to create a buffer around ...
1
vote
1answer
300 views
Points Layer to Distance Matrix QGIS 3.6 - Noosa
I'm trying to calculate a sample distance matrix from four points in the BNG CRS:
Using Vector-> Analysis Tools -> Distance Matrix, I get:
Input point layer is a MultiPoint layer - first convert to ...
2
votes
0answers
71 views
Count the number of points of a multipoint-feature [duplicate]
I try to use the fieldcalculator in QGIS 2.18 to count the number of points of a multipoint-feature. Is it possible?
1
vote
1answer
135 views
Connecting ordered MultiPoint features with lines/arrows
I'm working through an XY problem, with the end goal of effectively visualising data representing different journeys.
Given I have ordered data of the various positions (each with a time stamp) along ...
0
votes
1answer
42 views
Individual point attributes PostGIS Multipoint
I'm coming from a heavy Esri background and I'm trying to figure out how to create a multipoint feature in a PostGIS database that allows me to set a unique attribute for individual points in a ...
0
votes
2answers
3k views
Multipoint to point tool in Qgis
I have a multipoint adress layer creating problems with set-returning function cannot be used.
I tried :
Converting multipoint layer to point using PostGIS?
Multipoint vs point PostGIS
I tried ...
0
votes
1answer
228 views
Compute convex hull of points in a feature collection [closed]
I uploaded an asset (which was originally a shapefile of points) and imported it into my script as a feature collection. I would like to compute the convex hull of the points, but it seems this ...
1
vote
2answers
4k views
Points into Multipoint with Shapely
I have a list of x,y,z points named simply "A".
I'm trying to convert them to a multipoint with Shapely.
from shapely.geometry import Point, MultiPoint
orig = Point(1.9,2.5,3.1)
destinations = ...
1
vote
0answers
724 views
How to create multipoygon in Openlayers 4? [closed]
I want to create a separate layer in Openlayers 4 with multipolygon geometry. I thought, it's enough to know a few coordinates, put it in an array and create the geometry. After reading documentations,...
0
votes
1answer
597 views
Creating multipoint from point using PostGIS?
I am quite new to PostGIS.
I need take some points from an existing table and create a multipoint and save this.
How would i go about this?
The only way i can think without creating a new table ...
1
vote
0answers
19 views
QGIS 2.18 - how to plot a new point a certain distance and az from another point
I'm trying to figure out a way to plot a new point (or series of points) along a given az and a fixed interval. Essentially, I'm trying to build a grid for soil sampling.
ty
1
vote
0answers
64 views
Vector-Viewing Properties on Multipoint Geometric Correction in Erdas Imagine 2014?
I am following some old instructions that are not up to date with my latest version of Erdas Imagine. Where can I find the Vector viewing properties within the Multipoint Geometric Viewer?
The ...
1
vote
1answer
158 views
From routes of points make lines postgres ST_Makeline()
I have a dataset full of points that are routes. The data has time and id's with which I was able to ST_Union all the right points to form the multipoint for each route. Now I am trying to create a ...
0
votes
1answer
2k views
Leaflet Routing Machine Dynamically Generate Waypoints
I have a list of address that get geocoded. I want to then take those new lat/lon values and set them as waypoints in Leaflet routing machine so that an long route is generated. I have tried a loop ...
1
vote
0answers
186 views
Moving multipoint using ArcGIS API for JavaScript?
I am trying to move a multipoint object using the edit toolbar, but I keep getting the below error:
> Uncaught Error: [esri.toolbars.Edit::activate] Unable to activate the
> tool. Check if the ...
5
votes
1answer
606 views
Tolerance argument for ST_RemoveRepeatedPoints in PostGIS
I have a multipoint PostGIS table with 8,000 or so points that represent intersections in a city street grid. I'd like to clean up this table to remove any points that are within 100 meters of another ...
1
vote
2answers
1k views
How to convert multipoint attribute to polyline in QGIS?
I have a multipoint layer in QGIS with 860 points.
Each points has some attributes value from a join, and I need to use one of those attributes (a column) to draw polylines. I need one polylines for ...
1
vote
1answer
516 views
Count multipoints within polygon
It seems I can't count the number of individual points contained in multipoints geometries with
CREATE TABLE count_table
AS
SELECT poly_table.id,
count(multipoint_table.geom) AS count
FROM ...
2
votes
1answer
78 views
Boundary of MultiLinestring in DE-9IM
can somebody help me understand (probably giving visual examples) what does this sentence mean which is quoted from the wiki page of nine intersection model:
Those points that are in the boundaries ...
6
votes
2answers
225 views
Odd behaviour with MULTIPOINT layer in QGIS using delimited files and WKT
I'm writing some python to create grid lines, either as a series of densified LINESTRINGs or a set of MULTIPOINTs.
The code uses shapely, and I'm writing WKT to a CSV and importing into QGIS(2.18.3) ...
3
votes
1answer
533 views
A simple way to convert multipoint to point in sqlite table, using gdal ogr2ogr?
I have recently spent a good deal of time attempting to navigate my way around sql command line code using ogr2ogr, within the current release of gdal. As per the title to this post I need to convert ...
2
votes
1answer
2k views
Multiple symbols in the same points vector layer (data defined marker)
I've categorized multiple points for schools that are to be developed, reconstructed or demolished, with green, yellow and red colors if the schools capacity (the number of children) is increasing, ...
2
votes
2answers
2k views
OpenLayers 3 - different style/marker for each point on a MultiPoint feature
I have a MultiPoint feature with the following GeoJSON:
{
"type": "Feature",
"geometry": {
"type": "MultiPoint",
"coordinates": [
[
-123,
...
1
vote
1answer
365 views
Clip a Multipoint Feature Class (50 million points) with another feature class to get single xyz files [closed]
I have a very big multipoint feature class (in ArcGIS 10 imported from XYZ .txt files) and I have a shapefile which contains 50 polygons. (If I look at the attribute table, the 50 polygons are ...
2
votes
2answers
268 views
Order in PostGis multipoints
I am using PostgreSQL (9.5) and PostGIS (2.2.2).
I need to create a multipoint geometry while keeping track of the order of the points. (I would assume the point order to be the same order as the one ...
4
votes
1answer
149 views
MultiPointZ wkt geom “multiple part to single parts” is losing Z coordinate
I have a "MultiPointZ" unique wkt geom feature constituted of several hundreds of points (X,Y,Z) in a shapefile.
To split all these points each in a single feature, I used the "Vector > Geometry ...
3
votes
1answer
710 views
How to convert multipoint layer to polyline layer in QGis
How can I convert a multipoint layer to polylines layer in QGis. I am looking for a tool equal as the GeoWizards (convert > Multipoint to polyline) for ArcGis.
1
vote
2answers
894 views
Find centroids of rows with Multipoint Geometry
I wish to find the centroid of a set of given points. The points will be rows of my SpatiaLite database and have Multipoint geometry. I checked the SpatiaLite manual but the ST_Centroid function I ...
0
votes
2answers
102 views
Connect Multipoint Geometry type to create line
As you can see in the pic below i have some points "Sông Vĩnh Trà". Their Geometry type are Multipoints. They are parts of a river, so i want to connect them to display the river on the map. I tried ...
1
vote
1answer
636 views
Issues with creating an address locator using multi-point features in Arcmap/catalog 10.4?
The error I get when trying to create this locator is "000042: Failed to create the address locator which states that I must -
have permission to write to the disk/database
have enough disk space
...
2
votes
2answers
104 views
Is there a way to select all items within a circular buffer?
I want to select all the items within a circular buffer. Inside the buffer are
multipolygons and multipoints. See the screenshot i have posted.
