Questions tagged [multipoint]

is a collection of points, which groups multiple simple points geometries into sets.

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Point vs multipoints when creating a view it automatically decided to go to multi

I have a table with unique points, when creating a view it automatically decided to convert this geom to multipoints, so to do that it stores a second point with same details just varying the ...
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131 views

Replace MultiPoint, GeometryCollection & LineString geometries in shapefile with Point geometries [closed]

I have a geopandas dataframe that contains shapely MultiPoint, LineString, GeometryCollection and Point geometries. Cannot save the the geopandas because of this neither perform other operations (...
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Create geotools MultiPoint from java Collection

I would like to create a GeoJSON containing a MultiPoint from a list of WGS coordinates in my custom format (say MyLonLat). I wanted to use geotools library to simplify this, but I can't find a nice ...
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Making multipoint column with at least 2 points

I have a table called my_table that has a MultiPoint column. I want to limit the MultiPoint column. A Multipoint must have 3 Points most and it must have 2 points at least. How can I do the limitation ...
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Adding x and y coordinate fields to multipoint layer in PyQGIS

I have a MultiPoint layer in QGIS 3.18 that I wanted to add x and y coordinates to in its attribute table. Normally, I can just use field calculator and calculate the new field to be $x or $y. How do ...
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Aggregating MultiPoints to MultiPoint output using ST_Collect

I have a geometry column that stores MultiPoints. How can I aggregate MultiPoints having another MultiPoint as a result, not a GeometryCollection? select st_collect(geom), id from my_table group by id ...
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Generating MultiPoint column from two Point columns without changing number of rows using shapely

from shapely.geometry import MultiPoint, Point a=Point(1, 1.5) b=Point(2, 1.5) c=MultiPoint([a,b]) I am trying to create a MultiPoint column from two Point columns. Using the example code above, I ...
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R/sf - Transform a geometry column made of POINTs and MULTIPOINTs into xy-coordinates columns (x1, y1, x2, y2, ...)

After intersecting a set of routes (LINESTRING) with a perimeter (say the border of a country) using st_intersection from sf package, I get a list of points and multipoints: there is one point when ...
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Convert lasd to multipoint?

Is there a way to convert an .lasd to multipoint? I created this .lasd from .laz files using the 'Convert LAS tool' in ArcGIS Pro (.las were unavailable).
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Creating polygons based on attributes in point layer using ArcMap

I have a point layer of residential coordinates which includes an attribute field indicating the most visited hospital for the people living at the coordinate. From these data, I want to create a ...
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Keep only certain points on a layer

I'm using QGIS 3.10.4. I have a vector layer that contains more than 200 cities as multiple points on the layer. The attribute table has one column: city name. My goal is to keep only 10 certain ...
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How to quickly turn regular spaced points into a grid?

I'm looking for a quick way in ArcGIS Desktop or Pro to turn a set of regular spaced points into a grid like shown here Currently I am creating a fishnet first and then conduct a spatial join but I ...
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shapely split function does not work on short lines

I am trying to split a line with multiple points. I adopt the solution in here, but sometimes it does not work. from shapely.geometry import LineString, MultiPoint from shapely.ops import split line =...
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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 ....
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4 votes
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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 ...
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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 ...
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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 ...
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3 answers
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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,...
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2 votes
1 answer
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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 ...
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1 vote
1 answer
135 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 ...
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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 ...
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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'...
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2 answers
725 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 ...
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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 ...
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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" ...
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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 ...
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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 ...
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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 ...
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1 vote
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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) ...
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7 votes
4 answers
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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 ...
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3 votes
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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 ...
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1 vote
1 answer
627 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 ...
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2 votes
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142 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?
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1 vote
1 answer
285 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 ...
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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 ...
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  • 103
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2 answers
8k 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 ...
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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 ...
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2 answers
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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 = ...
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2 votes
0 answers
1k 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,...
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1 answer
1k 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 ...
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2 votes
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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
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1 vote
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97 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 ...
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1 vote
1 answer
733 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 ...
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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 ...
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1 vote
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260 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 ...
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5 votes
1 answer
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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 ...
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1 vote
2 answers
2k 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 ...
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1 vote
1 answer
722 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 ...
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  • 775
2 votes
1 answer
105 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 ...
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6 votes
2 answers
315 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) ...
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