Questions tagged [multipoint]

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

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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
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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 ...
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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 ...
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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 ...
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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 ...
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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,...
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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
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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 ...
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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 ...
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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 ...
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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'...
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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 ...
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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 ...
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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" ...
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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 ...
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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 ...
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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 ...
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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) ...
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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
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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
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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 ...
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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?
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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
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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 ...
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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 ...
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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 ...
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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 = ...
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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,...
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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 ...
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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
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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 ...
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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 ...
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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 ...
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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.
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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
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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
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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.