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Questions tagged [point]

A geometric element defined by a pair of x,y coordinates.

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1answer
26 views

Connecting dots with lines, thickness depended on attribute value

I am having a point data of in total of 10 destinations within a region. The goal is to present how many people which were in destionation "A" also visited the other 9 destinations. I have this data ...
3
votes
1answer
44 views

Distance between points along line

How do I determine the distance between points to the neighbor point that connected via the line(road)? In QGIS 3.8.3 I have tried v.distance and v.net.distance but they do not help. The line(roads) ...
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1answer
22 views

Displaying point data that is close together using ArcGIS Pro [closed]

I am using ArcGIS Pro to display point data on a map. Each of these points need to be displayed with clearly visible symbols. However, some of them sit very close together, and when displaying on a ...
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0answers
26 views

Get number of points in MultiLineString

How to get number of points in a MultiLineString using Shapely? intPoints = MultiLineString((372 130, 319. 109), (320 109, 300 101), (300 101, 150 40), (100 20, 92 17)) I want to perform this ...
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1answer
50 views

How do I find the area of a polygon covered by points of a defined size? (QGIS 2.18)

I'm using point vectors to portray 264 marked trees in a stand using the 'Random points inside polygons' tool (it doesn't matter where they are). Each point is 4.5m across (the average single tree ...
2
votes
1answer
28 views

Selecting random points from specific attribute in yield map using QGIS

I am using QGIS. A farmer has sent me the shapefiles from his John Deere combine. They were three shapefiles that I have merged into one layer. The shapefile is from one field with a treated ...
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0answers
35 views

Separating 50 duplicate points by limit in buffer zone using QGIS

I am building a customer database in QGIS. I get GPS coordinates for customers from my staff. Then I convert those GPS coordinates into shapefile points in QGIS. I get a lot of duplicate points. I am ...
2
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2answers
36 views

Routing a consecutive set of points on a network

I need to generate routes based on a consecutive set of points exactly as given in this routing script by Anita Graser. As given in this image, I have a layer of consecutive points as well as a ...
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0answers
12 views

How do I separate .lasd into point files of each class?

I am wanting to examine my DEM, DSM, and other models I'm generating from LiDAR data in the model wizard to find the method with the least amount of error. I want to separate the ground, and non-...
1
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0answers
18 views

QGIS point displacement with features that each have 2 variables

My goal is to use point disclacement to have a view like this without overlapping symbols: However, the result with using point displacement this (QGIS displays only the first attribute): If I ...
1
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1answer
39 views

Create point clusters based on grid

I am trying to make a systematic cluster sampling pattern for data collection. The sampling consist of the points placed over the landscape in 6 km span (red). From this major point, I need to create ...
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2answers
37 views

Random sampling in ArcGIS Desktop

I have 14,033 points representing the location of some weather stations across the 36 states in Nigeria. I want to use an ArcGIS Desktop sampling tool to implement a random selection of 200 points ...
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0answers
28 views

Get position/rotation of free labels in QGIS

I want to export the position and rotation of labels with placement "Free" as I need them in Mapbox, which has inferior label placement compared to QGIS. I've tried with various polygon-to-point ...
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0answers
41 views

Counting points in polygon containing holes using QGIS?

Basically, I have these area (part of a bigger map) containing many holes (e.g. lakes) I have thrown on the map some 1000 random points and I want now to count those that fall in that area. I already ...
2
votes
1answer
52 views

Getting nearest point but with a filter conditional in QGIS 3.4?

I have two point layers in CSV files, each with about 500 points/rows. Each point in both layers has a year column (attribute). I know how to use Distance Matrix to find the nearest point. BUT: For ...
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0answers
55 views

Creating DEM from points in QGIS? [closed]

I'm trying to make DEM from points in QGIS. I've read all the other questions regarding the same issue and tried them all. But, none of them worked. For example, at the end of inverse distance ...
1
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1answer
48 views

Counting unique species in polygon layer and buffer

Within QGIS I'm working on a data set that contains species at 100m resolution (eg OSGB 6 fig) and 10m or finer resolution (eg OSGB 8 or 10fig). The objective is to count the number of unique species ...
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0answers
21 views

combine layers in qgis

I have a Shapefile that includes country divisions (Polygon). I have another Shapfile that relates to the country's roadmap (Path). I also have another Shapfile that relates to the village points (...
0
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0answers
7 views

Matlab's geographicToDiscrete function does not return the correct col, row

I have a shapefile with points (in WGS84) that overlap with a raster layer (also in WGS84) and for each point I want to calculate the corresponding col and row raster coordinates. I work on Matlab ...
1
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1answer
44 views

Calculating number of polygons needing to be crossed?

I have a bunch of polygons (parcels, green areas) and a bunch of wells (point, black triangles). How do I calculate the number of parcels I need to cross to get to the closest well to each parcel? ...
1
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0answers
29 views

Point and Polygon Intersection [closed]

I have a .csv with a column for ID, latitude, and longitude, which creates points. I also have a .shp file which creates polygons of a parcel. I want to be able to attribute the polygon to the point. ...
3
votes
3answers
207 views

Insert n points equally distributed into many polygons

I know the "Random Points inside Polygons" tool in QGIS. It generates the below output. What I want to achieve however are 8 equally distributed points for each of the polygons. I thought of dividing ...
3
votes
3answers
152 views

Updating multiple vector points at once with vertex editor in QGIS?

I have a series of points in .shp format arranged in lines over an area, which I've used the 'regular points' tool to generate. In some of the lines, I want to decrease the spacing of the points so ...
1
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0answers
23 views

Recognized, calibrated test points for a rangefinding function?

I'm trying to find out if there are scientifically accepted calibration points to measure the effectiveness of a geodetic distance finding function. So far I've been using the listed latitude / ...
0
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1answer
23 views

Assessing if two variables (measured at point locations) covary in space?

I have a number of (point) locations at which two variables are measured. The two variables proves correlated (when using Spearman's r; the direction of the correlation is irrelevant here). How can ...
1
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3answers
100 views

Importing file where long and lat in one column

How to import a data file in which both longitude and latitude are combined in one column? e.g. 52.2299571,21.0099775
3
votes
1answer
120 views

Distance between two points - by ID in QGIS

I have a dataset of 350 or so individuals. Each individual has a start point (2 columns with Lat and Long) and end point (2 columns with Lat and Long). I would like calculate the distance between ...
0
votes
1answer
50 views

Apply symbology based on an algorithm (ArcGIS)

Been battling this problem for a long time now, so hoping someone here can shed light on a possible solution. The problem is that I have 100 points and I want to apply a color palette to the points so ...
0
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0answers
51 views

Converting multiple points to multiple polygons - ArcGIS Desktop 10.6.1

How can I convert multiple points to multiple (tiny polygons)? I need to execute a merge function and I need the points to be polygons so that the toolbox can do its job and join multiple polygon ...
3
votes
1answer
41 views

Find duplicate point geometries in a shapefile [closed]

How to find a duplicate point geometries in point shapefile (around one lakh geometries) using Python OGR/GDAL
0
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1answer
50 views

Creating random points from attribute field

In QGIS 3.6, I wanted to create different layers of random points reading different fields of an attribute table. For example: City #cinemas #malls #stores A 15 10 12 B ...
2
votes
1answer
50 views

Circle around all points of a layer

I want to draw a single circle which includes all points in a layer, but is as small as possible (so the two outermost points are exactly at the line). Is there any way to do this in QGIS (3.4) or ...
1
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1answer
38 views

Calculating minimum distance between all points of 2 different point layers using QGIS? [closed]

I use QGIS 2.8.3 or 3.4 whatever works better. I need to calculate the mimumum distance between all points of 2 different point layers. I was reading this post https://gis.stackexchange.com/a/62212/...
1
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1answer
36 views

How to count points of a point layer (shp) for each depth class of a bathymetry vector layer

I am using QGIS 2.8.3 but also have 3.4 whatever works better for this issue. I have a bathymetry shapefile and a point layer. One of the columns of the bathymetry vector gives the maximum depth and ...
1
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2answers
31 views

Check if two different class points fall within the same cell of a grid?

I am very new to R and GIS and statistics. I'm trying to find out if two set of points of different class (ie. species) that I have are aggregated or seggregated. For that I need to randomize the ...
1
vote
2answers
29 views

Highlight, count and delete overlapping point locations from different CSV layers in QGIS?

I have many CSV file layers in my project in QGIS, and quite a few layers have points which share the same location. Is there a way I can compare, count and highlight those "duplicates" and then ...
1
vote
1answer
33 views

Extracting pixel values for specific point locations in WGS 1984 / EPSG: 4326 image

I have a remote sensing image with GCS WGS 1984 / EPSG: 4326. I need to extract pixel values from this image which corresponds to specific point locations. For that purpose, I defined these ...
1
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1answer
32 views

Count points from two tables in polygons with PostgreSQL/PostGIS

I've got CREATE TABLE points1 ( point1id varchar PK, geom1 geom, date1 date); CREATE TABLE points2 ( point2id varchar PK, geom2 geom, date2 date); Both with indexes. I ...
1
vote
1answer
30 views

Defining point location at EPSG 4326 image

I am new in the field and I would like to ask which is the correct way to define a point location for an image with EPSG 4326 crs. I used QGIS software, and created a .csv file with the latitude - ...
0
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0answers
22 views

Extending line to points an unspecified distance using ArcMap? [duplicate]

I would like to extend polylines (roads) to existing points (addresses points). Mostly driveways that are very close to the points. Extend Line does not do it since it requires a specified distance ...
4
votes
2answers
74 views

Coloring points by raster values in QGIS?

While it's simple to color a point shapefile by an attribute field, I can't figure out how to match the colors with those from a raster. I have a raster file that I'm displaying with a continuous ...
1
vote
1answer
33 views

Point symbol rotation in QGIS 3

In QGis 2.x, I could rotate a point symbol towards the nearest geometry of a certain kind by using: geomnearest('featuretype', 'BEARING') This however does not work in QGIS 3.x, and I cannot find ...
1
vote
1answer
52 views

Do not show a point symbol for a point if closer than nn meters to another point in same layer

I have a layer consisting of points (big stones), and there are too many points to be able to show them all in the scale I am using in my print composer. What is the most efficient, and preferably ...
1
vote
1answer
25 views

TIme Series Analysis with Point Data

I'm using ArcGIS 10.3, and I have 20 shapefiles, each representing 1 year worth of data over the same study area, that contain postal code point data, with each point having some NDVI values (growing ...
0
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0answers
7 views

Assigning points to buffers in MapInfo12.0

First time using MapInfo. I want to essentially spatially join a point(s) that is situated inside a buffer together (so that the point and buffer have the same numerical ID). My table currently listed ...
4
votes
2answers
82 views

Calculate the travel time from locations to the closest N points

I want to calculate the travel time (based on walking time) from locations to the closest N points of another dataset. Then I want to create a hull around those N closest points per location Is this ...
0
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2answers
59 views

How to transfer POI layer from QGIS to OSMAnd?

I've got a POI layer (vector layer with single-point geometry) in QGIS and would like to import these points to OSMAnd under "My Locations" including the attributes (like name of the point). How can I ...
1
vote
1answer
40 views

Error on Line 109 of Creating Random Points in Layer Bounds Tool

I am using the latest version of QGIS 3.6.3 and I am getting the same error regardless of what I do when trying to run the Create Random Points in Layer Bounds tool. Here is the error: QGIS version: ...
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0answers
18 views

Using kernel density estimates as attributes for point data? [closed]

I have spatial point data (say addresses of all inhabitants of a metropolitan area or larger region) with context data for each point like age, gender, employment status, and so on. For each spatial ...
2
votes
1answer
162 views

Automatically add points geometry while GPS logging?

I have a PostgreSQL 10 Server (x64) running on my Windows 8 (x64 based) machine. On the top of my Postgres database, there is PostgREST API running that receives GPS data (5 seconds interval) from a ...