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Geographic Information Systems

Questions tagged [multipoint]

The tag has no usage guidance.

41 questions
info Newest Frequent Votes Active Unanswered
1
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1answer
43 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
28 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
53 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
0answers
26 views

Convert multipoint to point in ArcMap

I need to use ArcMap 10.4 to load a shp that is now a multipoint layer into our SDE, which expects point layers. This is the error message When I follow the steps on this Esri page, I get this error ...
0
votes
1answer
25 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
152 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
101 views

Compute convex hull of points in a feature collection

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 ...
0
votes
2answers
602 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
242 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
276 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
41 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
46 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
851 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
124 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 ...
4
votes
1answer
316 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
420 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
312 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
61 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
159 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
353 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
1k 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
1k 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
317 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
181 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
116 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
546 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
611 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
81 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
552 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
99 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.
3
votes
1answer
161 views

How is the record count of a multipoint shapefile dbf file determined?

I'm writing a program to create a multipoint shapefile (.shp .shx .dbf), and I'm not sure how the format of the .dbf file should look. The .dbf starts off with a record header, followed by field ...
1
vote
0answers
56 views

Size based scale problems in point displacement styling

I am trying to style shapes for a continuous variable by size in point displacement. I used point displacement because I have multiple sampling events for sites. I styled my categorical data with ...
2
votes
1answer
749 views

Creating a Terrain from a Multipoint file if the “New Terrain Wizard” is missing?

I created a multipoint file using the tool LAS to Multipoint in ArcMap. After it was done processing, I went to my geodatabase, right-clicked and attempted to create a terrain. However, the wizard ...
2
votes
1answer
359 views

How to select centroid of multiple nearby points with same attribute

This question is very similar to #131823, that is not solved yet. I want to merge several points like bus stops into one single point in the centroid of all selected points. The bus stops have a ...
3
votes
0answers
153 views

OpenLayers WFS Multipoint

I am modifying a OpenLayers setup which uses WFS capabilities to create a vectorLayer on a map to support multipoints. GeoServer is setup to send points and multipoints however only points are ...
1
vote
1answer
573 views

Multipoint shapefile won't display

I have created a multipoint shapefile file and added lat/long data for a few hundred points (by copying and pasting columns of data from excel). The new shapefile is the same coordinate system as my ...
0
votes
1answer
51 views

Points shapefile resulting in MultiPoints table in PostGIS

I have a Points shapefile. When opened with QGIS, the type is 'Point' (right-click on the layer and check properties). When imported in PostGIS using pgAdmin III plugin 'PostGIS shapefile and DBF ...
2
votes
1answer
4k views

Converting multipoint geometry to ONE single point using ArcGIS Desktop?

I have an ArcGIS file geodatabase with two featureClasses. One is a point featureClass which represents the centroids of the cells of a regular grid. The second represents the corners of each grid ...
0
votes
1answer
600 views

How to preserve GPX track point (trkpt) info when performing ogr2ogr with sql ST_union operation

I am performing GDAL ogr2org operation with ST_union(Geometry) on tracks from GPX file to split those at intersection points. Track points have elevation and depth info. In GPX track point entry looks ...
2
votes
4answers
5k views

Is there a way to get Z value from 3D multipoint shapefile in QGIS?

Is there a way to get Z value/height/altitude from 3D multipoint shapefile in QGIS? All I found is way through SpatiaLite or PostGIS as explained here: http://faunaliagis.wordpress.com/2013/08/14/...