Questions tagged [point]

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

Filter by
Sorted by
Tagged with
0
votes
1answer
7 views

QField edition: deplace point object

I would like tu use QField to update localisation of points objects that their fields are already informed. With the editing tool I don't manage to deplace point despite I see several "how to&...
0
votes
0answers
15 views

Intersecting Floating Points within a value range to parcel boundary

I have an NDVI with values of -0.99 to 0.88. The raster is floating points with no attribute table. I also have farms as parcel polygons. Using ArcMap or ArcGIS Pro, how can I intersect only the ...
1
vote
1answer
23 views

Create lines of based on same ID points

I have an excel file containing coordinates of taxi positions which I would like to turn into lines in QGIS. The example data are as follows no trj_id lat lng 1 10162 -6.32044 ...
0
votes
0answers
16 views

Label data points in Leapfrog Geothermal [closed]

I have UTM coordinates for various geothermal spring locations. All of the springs have labels (1,2,3 etc) in the CSV file but I can't figure out how to display the spring# on my map. I have the ...
-2
votes
0answers
25 views

Grouping points in a map [closed]

I have different groups of points, with latitude and longitude of each point. Adding a new point with random latitude and longitude, I want to know in which groups this point should be.
2
votes
1answer
54 views

Calculating minimum distance between two point layers within polygons in QGIS

I have three vector layers two points and one polygon: Centroids (POINTS FROM) NUTS_ID | CNTR_CODE | NUTS_NAME | id Sorting_plants_2020 (POINTS TO) postcode | name | where | capacity | id ...
0
votes
1answer
36 views

SRID not updating

I have created a point geometry using ST_GeomFromText function in PostGIS and simultaneous set the SRID to 3857. Alter table data.trips_42779 add column geom geometry; UPDATE data.trips_42779 SET ...
1
vote
1answer
23 views

Accessing initial point data inside of point metrics functions with lidR

I am using the R package lidR to do some analysis on a large forestry point cloud. I am trying to write my own point_metrics() function for identifying outliers. How can I access the X, Y, and Z ...
1
vote
0answers
37 views

Find nearest point with the same attribute

I have a points data set of toponyms with several thousand elements. There are a lot of duplicate names that fall in two categories: legit ones, i.e. different places with the same name at several km ...
4
votes
1answer
68 views

Cluster points in each polygon into n parts

I am working on adding 2000 random points to each of 2 polygons and then clustering the points in those polygons into 4 clusters for each polygon. When I apply ST_ClusterKMeans() in PostGIS, it ...
2
votes
1answer
46 views

How to query elevation data from “Digitales Geländemodell (DGM) NRW”, maybe using WCS?

I use street network data originating from OpenStreetMap, stored in PostGIS, and want to add corresponding height/elevation data from "Digitales Geländemodell (DGM)", available for North ...
2
votes
0answers
32 views

Getting characteristic high points from DEM

I use QGIS 3.14 and I have a DEM file which I'd like to use to get a point layer with most characteristic high points from that DEM. So every top of the mountain, hill, hillock, low etc should be ...
0
votes
0answers
11 views

DoesNotExist: WorldBorder matching query does not exist

I recently started the geodjango tutorial from the django documentation, but I'm currently stuck because I keep getting a DoesNotExist: WorldBorder matching query does not exist error when I run ...
0
votes
0answers
35 views

Converting points with Easting and Northing to polygons of GB OS Grid references?

Is there a tool or procedure on ArcMap 10.8 (similar to the Tom.bio plugin in QGIS) that allows the conversion of points with easting, northing and grid reference info into polygons of GB OS Grid ...
3
votes
3answers
150 views

Creating points along 3D stream at inflection points

My goal is to generate points along my stream centerline at any positive inflection points (0.5 feet in elevation or greater). I used a Water Surface Grid (Raster) to convert my stream centerlines to ...
-1
votes
2answers
60 views

Counting number of types of the point feature class within polygons in ArcMap

I have two feature classes - artificial polygon grid and a point geosites feature class. I have to count number of types of geosites in each polygon of the grid. For example from an image - the left ...
0
votes
0answers
33 views

How do you convert SpatialPoints object to PPP object?

I have a shapefile layer of polygons (houses in a city) that I want to run a kernel density on using the density() function in spatstat in R. To get my polygons as points I turned them into ...
1
vote
1answer
64 views

Creating circle-polygon of certain radius around points in QGIS

I have a point layer in QGIS in EPSG:4326 and want to create polygon-circles of 10m radius around each point. All of the points are located within a squarekilometer in northern Germany. How do I do ...
3
votes
1answer
132 views

Transferring attributes to neighbors in point layer using QGIS

My goal is to create a wind map for an area about 300 km² in QGIS. For this i have the data of only one weather station. The idea is to estimate the wind speed by the roughness lenght and the ...
2
votes
0answers
46 views

Reducing points but maintaining attributes from original shapefile

I have a shapefile with points but there are a lot of points and I want to reduce the amount. I have tried "Points thinning" which automatically reduces the amount of points but it loses all ...
2
votes
0answers
13 views

Generating equidistant Points inside box which also contains MultiPolygon [duplicate]

I have a box bounded by min_x, min_y, max_x, max_y, I also have a multipolygon = poly contained in that box. I'm trying to equidistantly scatter points throughout that box, outside of that ...
3
votes
2answers
63 views

Merge cluster of points into polygons

This is my project: I want to convert all points that touch each other into polygons, something like this (I know I missed some of them): I tried using dissolve and convex hull to do that, but they ...
3
votes
1answer
45 views

Getting closest point-feature of another point-feature

I have two point-shapefiles. For each point-feature in one of those two files I want to identify the closest point-feature from the other file and save the "ID" of this point as attribute. ...
0
votes
0answers
29 views

Is there a QGIS plugin to drop pins on a repeating pattern in a raster?

I'm looking for a QGIS plugin that drops pins on a repeating pattern in an imperfect raster grid, for example a satellite image. Ideally, one would select a polygon to drop within, a raster, give it ...
4
votes
1answer
99 views

Getting coordinates across one road

I download .shp and .dbf files for roads, extract it and save to database. I display points with the same name as the street on my own Google Map. This is how it looks like: I found that not each ...
0
votes
1answer
27 views

Finding best path through set of many points using ArcGIS Pro

Assume I have many points, say 100 or more, that represent a station to visit. I want to choose one of them as a starting point, and then navigate to each and every one thereafter to take a sample of ...
0
votes
0answers
27 views

Fixing fixed layer offset

I have a shapefile layer whose CRS is WGS84. However, all points are off by some fraction of degree, roughly corresponding to a dozen of meters. Is there a way in QGIS to fix this offset? I can more ...
1
vote
1answer
26 views

Display connections between points in QGIS interactively

I have a layer (pointLayer) with point features: Fields: ID, toID. All points have a value in ID, some have a value in toID. If a point "A" has a value in toID, I want to display a line ...
1
vote
1answer
31 views

Finding the percentage of change of 30 meter resolution raster within buffer area

How could I find the percentage of change for each buffer area in the image below using ArcGIS Pro 2.5.0? I want to be able to show the percentage of change for each INDIVIDUAL and "unique" ...
-1
votes
1answer
9 views

Multiple symbols for various attributes of the same feature

I have a point feature class where many points have more than one value for the same attribute (the values are in a single column in the attribute table, separated by commas). I am thinking of ...
1
vote
1answer
33 views

QGIS distance between points - line_locate_point()

I need to calculate distances between points that are overlapping a layer with a line (representative of a river corridor (thus there are two layers; one is the points the other is a line). I've tried ...
2
votes
1answer
26 views

Exporting points according to a route I made

So I work on a ship and get given a shape file with points on it and I am required to make a vessel route out of this. The problem is that once I have created a route between all the points and export ...
0
votes
1answer
30 views

How to label point features with alphanumeric labels. Only allowing numbers?

New to QGIS. Using point features as markers on a map imported from Google Earth. In my first shapefile layer the alphanumeric labelling worked fine. Added in a second layer and it is only allowing ...
7
votes
3answers
274 views

Creating polygons with fixed extent based on point which represents S/W corner using QGIS

I have a point data set which contains the information of workplaces per hectare. Each point represents the South-Western corner of the surveyed hectare. Not the entire map is covered with points, ...
3
votes
2answers
84 views

Spatially join attributes from point to polygon side with numerous contiguous polygons and numerous adjacent points

I have been trying for 2 days to join points representing addresses (in Paris region) to the closest polygon (parcel of land). The problems: The parcels of land are contiguous, sometimes a point ...
1
vote
0answers
103 views

Create point at every vertices of feature

I have a layer with polygons and one with points at every vertices of polygon ( so I can label them with a number). I want to create a point at every new or modified vertex with virtual layer. At the ...
1
vote
1answer
91 views

“Select by location” fails for points touching/intersecting on lines

I try to use the "Select by Location" tool in QGIS 3.10 to: Select points in one layer located on lines of another layer (I am using "intersect" option but I have also tried the ...
4
votes
1answer
103 views

Spatial interpolation in PostGIS without outputting Raster

I have some data that is similar to rainfall, ie. a latitude, longitude, and a Z number. It is in a point layer that is a nice clean point grid. Many Z numbers are missing in this grid. I want to ...
1
vote
2answers
77 views

FME: Coordinates with a buffer - how to merge / dissolve points that overlap other buffers?

I'm trying to process some spatial query in FME. I have a dataset of cities with coordinate pairs and around these coordinates a buffer of 2 km. This results in multiple overlaps. I'd like to dissolve ...
1
vote
1answer
56 views

Export/convert Points to Polygon

I have to convert a .shp into a .csv file and upload it to the SQL Server, for a program that only supports Polygon format and can not render Points. Is there a way to convert Points to Polygon or is ...
3
votes
1answer
52 views

Snap Geometry to Layer (Line to Point) does not snap all lines within the tolerance limit

I've been using QGIS 3.14 version to snap geometries to layer. When I try to run this, I have to fix the geometry first before I run select by location. I checked the output, most are correct but ...
0
votes
0answers
48 views

160180: The junction has invalid geometry (i.e., non-point or invalid location)

I made the following In ArcGIS Pro: I created a point layer from elevation lines (every 10 meter, in total there is 5.5 million points). TOPO TO RASTER- When I run this tool with the point layer from ...
0
votes
1answer
26 views

Creating a new layer based on criteria of multiple layers

I'm really new to ArcGIS and have been trying to search for whether this is possible but don't know the correct terminology to look it up. I have two layers on my map, one of lines and one of points. ...
1
vote
0answers
28 views

Using QGIS Rotate Point Symbols tool when multiple point objects have same coordinates

I'm using SVG symbols to display a layer which represents the location of traffic accidents. The rotation of the symbol indicates the direction the vehicle was travelling. The rotation angle is ...
2
votes
1answer
106 views

Interpolating point on each line from vertex in QGIS

How can I interpolate a point on each line from the vertex? I need to interpolate each vertex along the line for a certain distance. I need offset on all lines. Standard QGIS tools shift incorrectly ...
1
vote
0answers
23 views

List points from other layer where intersects with line

I want to make an easy script for QGIS calc. I have 2 layers (points, and line). Painting the line crosing by points. At end I want to automaticly fill fild (text attribute) with list of points. I was ...
1
vote
0answers
32 views

Point density with ModelBuilder

Now I have a lot of files that contain XY coordinates, like the picture, but this picture just contains one day. However, I want to integrate all the files I have. Secondly, I want to integrate all ...
0
votes
2answers
65 views

Finding median value of many points within polygon using ArcMap

I am using ArcMap version 10.7. I have 2 layers, one point and one polygon (council district boundaries). The polygon layer has several polygons in it and each point has a dollar amount associated ...
2
votes
2answers
42 views

Update coordinates on geopackage with shapefile

I have a geopackage file that has all the information about certain items but the coordinates need to be updated. I'm using an old Leica 1200 GPS to get the new coordinates and giving the same ID to ...
0
votes
1answer
41 views

Getting maximum distance for point features in the same point group

For each group I want to find the maximum point-to-point distance (and which of the id1 features participate in the max). For example, if I have the following attribute table: FID Long Lat id1 ...

1
2 3 4 5
34