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Questions tagged [multipoint]

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

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OpenLayers snap to multipoint layer

Implementing snap interaction by getting snap points as features in layer. The draw interaction does not snap to displayed nodes. What is wrong? snap_nodes = MULTIPOINT((350095.29 650021.37),(350097....
Smita Verma's user avatar
1 vote
1 answer
23 views

Adding Multipoint layer OpenLayers for snap interaction

I am trying to implement snap on my map, getting snap nodes as a multipoint wkt as snap_nodes and creating and adding a layer, but the layer doesn't show snap_nodes = MULTIPOINT((350095.29 650021.37),(...
Smita Verma's user avatar
3 votes
2 answers
117 views

How to Append a POINT to a MULTIPOINT column

I have a table in postgresql that includes a geometry(MultiPoint,4326) column. I want to run a process that appends a new MULTIPOINT(4.49306 52.26167) to this column. I am currently doing this: UPDATE ...
bcsta's user avatar
  • 191
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0 answers
140 views

Python: interpolate dataset to create a global map

I have a NetCDF dataset (this) with values for the world's oceans. The measurements are in the form of unevenly spaced points: Now I want to extract some values at specific locations. My problem is, ...
terauser's user avatar
1 vote
0 answers
128 views

When i export (save feature as) a polygon in QGIS it converts to a multipoint and multipolygon how do i stop this

Im using QGIS and I have a property boundaries .shp When I try to export this using the 'save feature as' option the resulting shpfile has missing poylgons and it has converted itself into multipoints ...
Sophie's user avatar
  • 11
0 votes
1 answer
71 views

Google My Maps visualization doesn't correspond to edit mode

I have created a Google My Maps project with only two layers: one of them is made by points representing schools and the other one is made by lines representing rivers. Some schools, however are ...
Eric Lino's user avatar
  • 394
0 votes
2 answers
160 views

Extract Z-values from multipoint feature in Pyqgis

I have a program that stores elevation data in a multipoint vector using QgsPoint. caps3 = mp_layer3.dataProvider().capabilities() #check layer capabilities if caps3 & ...
david_adm's user avatar
6 votes
2 answers
272 views

Applying Geometry Generator for MultiPoint feature in QGIS

I have used the Geometry Generator in QGIS to successfully create a polygon around a point that represents the canopy of a tree based on the cardinal direction recordings. What I cannot figure out or ...
Nathan's user avatar
  • 157
1 vote
0 answers
38 views

How to get one seperate viewshed raster for each points that are on the same shapefile?

I have a shapefile with several points (1 of 30pts and one of 100pts), and I would like to generate a viewshed/field of vision for each point. The objective is to know, for each point, 1) the surface ...
Lea's user avatar
  • 11
2 votes
1 answer
2k views

Point vs Multipoint and table join using QGIS

I have to point some pottery on QGIS. The thing is that each pot has a key number but it may be found in more that one broken pieces (example: P234 has 4 pieces). Should I add them on my floorplan ...
Ermioni's user avatar
  • 21
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0 answers
28 views

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 ...
user7993425's user avatar
1 vote
1 answer
2k 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 (...
pyaj's user avatar
  • 175
0 votes
1 answer
235 views

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 ...
Piotr G's user avatar
  • 101
6 votes
2 answers
285 views

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 ...
feyzullahyildiz's user avatar
0 votes
1 answer
1k views

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 ...
WFL.GIS's user avatar
  • 137
3 votes
1 answer
172 views

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 ...
Lokomotywa's user avatar
  • 1,181
2 votes
1 answer
2k views

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 ...
S Hendricks's user avatar
2 votes
1 answer
3k views

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 ...
Antonin's user avatar
  • 865
0 votes
1 answer
496 views

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).
ecology's user avatar
  • 143
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0 answers
235 views

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 ...
Sofia S's user avatar
  • 41
0 votes
2 answers
187 views

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 ...
orange's user avatar
  • 47
1 vote
0 answers
1k views

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 ...
Kristina's user avatar
  • 1,073
1 vote
1 answer
686 views

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 =...
WZhao's user avatar
  • 121
1 vote
1 answer
681 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 ....
fjellrev123's user avatar
4 votes
1 answer
2k 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 ...
Wu Wei's user avatar
  • 161
1 vote
1 answer
30 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 ...
EricBHK's user avatar
  • 53
0 votes
1 answer
112 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 ...
Lollo's user avatar
  • 531
3 votes
3 answers
2k 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,...
André.B's user avatar
  • 183
2 votes
1 answer
385 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 ...
pranshuagarwal's user avatar
1 vote
1 answer
228 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 ...
Basile's user avatar
  • 617
1 vote
1 answer
3k 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 ...
till Kadabra's user avatar
1 vote
0 answers
144 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'...
user3355655's user avatar
0 votes
2 answers
1k 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 ...
tho_mi's user avatar
  • 138
3 votes
3 answers
2k 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 ...
Anthony W's user avatar
  • 245
1 vote
0 answers
31 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" ...
Basile's user avatar
  • 617
1 vote
2 answers
243 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 ...
Francesc Cañas Soler's user avatar
0 votes
0 answers
348 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 ...
DEA's user avatar
  • 17
0 votes
1 answer
97 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 ...
jpinilla's user avatar
  • 3,230
1 vote
1 answer
4k 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) ...
CNIDog's user avatar
  • 479
7 votes
4 answers
2k 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 ...
CEL-ma's user avatar
  • 1,015
3 votes
1 answer
2k 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 ...
JoeTheShmoe's user avatar
1 vote
1 answer
996 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 ...
Newb's user avatar
  • 23
2 votes
0 answers
153 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?
user137021's user avatar
1 vote
1 answer
383 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 ...
Jonny's user avatar
  • 469
0 votes
1 answer
155 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 ...
tpubbsGIS's user avatar
  • 103
0 votes
3 answers
14k 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 ...
Lay's user avatar
  • 305
1 vote
1 answer
540 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, with each point being an independent isolated feature. I would like to compute ...
setophaga's user avatar
  • 209
0 votes
2 answers
12k 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 = ...
Spatial Digger's user avatar
2 votes
0 answers
2k 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,...
ben_GI89's user avatar
1 vote
1 answer
2k 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 ...
Tom Piggott's user avatar