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Questions tagged [points]

The tag has no usage guidance.

1
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1answer
51 views

A line between point to nearest neighbour point using QGIS

I have a layer of points in QGIS which represent electric poles How do I create a polyline layer that would have lines running between the poles so it can represent the the electric cables that ...
2
votes
2answers
35 views

tool for point aggregation and mean calculation

I have the huge number of points spread across some map. Is it possible to calculate the mean value of a parameter in the points of a small area and make one point for the same so that the total ...
0
votes
2answers
57 views

Loading Point Layers on Smartphone

i calculated some Pointlayers with Qgis and i want to find them in the field. Can i load these points including the GPS-data on mysSmartphone and use it as a GPS-device? Are there any Apps?
0
votes
0answers
36 views

Using ArcMap add x y data, points are in wrong location [duplicate]

According to ArcGIS esri when I add a CSV with the "add XY" tool, * "The tool automatically adopts the data frame’s coordinate system"*. Since I'm importing a csv with no defined coordinate system, I ...
2
votes
1answer
46 views

Is there a way to calculate length of linestring from one point to another?

If I have one linestring and coordinates of two points on that linestring, what is the easiest way to calculate not shortest distance from those two points, but distance over the given road (given ...
1
vote
2answers
33 views

QGIS: Is there any interactive tool to select previous or next points using fid/attribute table order?

I have a huge point file (4933873 points, currently in GeoPackage)) looking this way: imported from a CSV of following structure: Captured Time,Latitude,Longitude,Value,Unit,Location Name,Device ID,...
0
votes
1answer
14 views

Display all values in mapserver-layer

I have a mapserver map-file that gets data from postgis-tables. One of the tables holds several linestrings that i set as points in the map-file. They show up based on the zoom-level in my map. Is ...
1
vote
0answers
58 views

Points won't display on map using OpenLayers 3 and MapServer

Im constructing a Vector-tile map using data from the following site GeoNorge -N5000. Im constructing it using OpenLayers 3 and MapServer with the data being passed from a PostGis database. I've ...
2
votes
2answers
76 views

Best site location to plant trees

I would need to find out which is the best location to plant new trees on a plot of land I already have. I´ve created a vector file for the plot(polygon) and another one (points) to indicate the ...
0
votes
0answers
41 views

Points to a 1km x 1km cell grid

I have a large database of point data throughout all of Eastern Australia. Each point represents species presence/absence data and has attached about 18 predictor variables. To account for sampling ...
2
votes
1answer
51 views

Compute mean attribute value of point features in same category?

I've got a point shapefile wih a column with categorical variable and a column with numerical values like the one below Point | crop | NDVI 1 | wheat | 0.9 2 | barley | 0.7 3 | ...
0
votes
1answer
39 views

Generating a table of distances between points and edges of nearest polygons?

I have two shapefiles, one of made up of country borders and one made up of points randomly dotted around an ocean. How do I generate a table of all the distances between the points and the closest ...
2
votes
2answers
67 views

Programmatically extract edge points from many polygons?

Objective: Extract the four Latitude, Longitude points which correspond to the corner edges of each polygon in the Military Grid Reference System (MGRS) shapefile. How can this be done in QGIS? In ...
2
votes
1answer
158 views

How to create random points inside polygons in QGIS?

Has anyone created random points within polygons in QGIS 3.0? I created multiple polygons and would like to create multiple random points within each polygon. I am trying to have the number of points ...
0
votes
1answer
65 views

Leaflet - Creating lines to connect GeoJSON points

How do I create lines connecting GeoJSON point features with the same "ligne" data following a given order (Id for exemple). This is what my GeoJSON looks like : { "type": "FeatureCollection", "name"...
2
votes
2answers
244 views

Save points and lines within the same shapefile

Is it possible to save points and multiline strings within the same shapefile? If so, how?
1
vote
1answer
24 views

Only output points near borders, excluding points near coast

I would have liked to ask for help, being confronted to a problem with ArcGis. I have in fact a shapefile of countries and a bunch of points. I would have liked to keep only the points that are ...
3
votes
2answers
78 views

Select a specific line length after and before a point

As you can see from the attached image, I have a shapefile of river network (line) and a point shapefile (this one represents the middle point of transects carried out in the area). I'm trying to ...
2
votes
1answer
54 views

Delete points on one side of a line in QGIS

I have a bunch of points and line that represents a boarderline as shown below: I want to delete all the points one the right side of the line, and letting the points in the left side stay. I dont ...
2
votes
3answers
94 views

Need tool for ArcMap to draw circle touching three points

I need tool for ArcMap 10.2.2 for Desktop to draw circle by (touching) three points. I don't know where the center of this circle and this three points shoud be on the circle line. I have such ...
2
votes
0answers
40 views

Attributing Points based on Direction

Using QGIS 2.18.16 I am looking at "renaming" or changing the attributes of points to a unique attribute based on the direction of the points. For example A1, A2, A3, then next row starts over as B1, ...
0
votes
0answers
16 views

Lost data in saving temp events to point layer. ArcGIS

I have imported an excel sheet and projected the xy coordinate information to a temporary events layer. When exported to a point layer half of the data in attribute table is missing e.g. the field ...
2
votes
0answers
95 views

Creating a Graph from a lines AND a points shapefile in networkx using read_shp

I am trying to use networkx for analysing networks which I represented in QGIS as a line shapefile and a point shapefile. If I import only the lines shapefile using networkx.read_shp('lines.shp') I ...
1
vote
1answer
83 views

3D Points within 3d Polygon in PostGIS

I've been working with PostGIS for a while now and I'm able to run queries over huge datasets fairly easy and fast. However, I do have an issue now that I don't know how to solve. I did find some work-...
0
votes
1answer
65 views

Listing all points in polygon geometry using ArcPy? [closed]

Based on my understanding in coding, I thought the following code will list me all points in every polygon in workspace: arcpy.env.workspace=r'D:\test.gdb' rows=arcpy.da.SearchCursor("Building","...
0
votes
0answers
18 views

Ghost points in LineString

I am getting Ghost points in linestring (marked in blue circles), when I check the attribute table it has no data regarding the Ghost points. So I tried to play around with it using NodeTool, and it ...
5
votes
0answers
324 views

Using QGIS 2.14 to creating a evenly distributed grid of points, spaced 500m apart, that takes terrain into account [closed]

I am using QGIS 2.14 (Essen Version). I need to create a grid of points within a given area so that each points 500m across the ground from any other point. At these points trail cams will be placed,...
2
votes
1answer
57 views

In QGIS all my points end up at 0,0

I have been trying to import a CSV file into QGIS 3 on Linux. I end up with all my points at 0 lat and 0 long, off the coast of Africa. They should be in Florida. I cannot find this same issue in the ...
1
vote
3answers
65 views

Merge overlapping points in the same layer by maintaining both attbributes

I have a road network layer where each line segment is broken off by intersecting line features. I ran the intersect tool to create points along each line intersect to represent 'Intersection' point ...
1
vote
0answers
84 views

R GIS - Error when converting SpatialPointsDataFrame to raster : 'data' must be of vector type, was 'NULL'

I would like to convert a SpatialPointsDataFrame into a fine raster (5m resolution), using R GIS. My SpatialPointsDataFrame is made of 593 points, equally distributed along a 8km-grid. Their ...
2
votes
3answers
103 views

Dynamically update points with xy coordinates in table

I have an Oracle database table with columns for 'X' and 'Y' coordinates. Now I want to display these points in ArcMap. I can use the 'Display XY data' tool for that. My table in the database with XY ...
1
vote
2answers
68 views

Point data location to be set by Polygon ID

This might be stupid but I am trying to put points collected on the field to match the location from where they were originally collected. AS the X and Y coordinate of the point might not match the ...
1
vote
2answers
50 views

Count number of Points within a varying distance

I have a set of points (roughly 500,000 houses), and I would like to compute how many other points (sea buoys) are within a radius of each house. The search radius for each house is its distance to ...
0
votes
2answers
87 views

Creating points on either side of the line at specified intervals [closed]

With the tool "Generate points along line", it creates points along the line which I don't want. I Want the distance between two alternating points (zig zag) should be 250m and between the distance ...
2
votes
2answers
292 views

Calculate distance to points along line in ArcMap?

I have two shapefiles: a series of points and a polyline created from the points with the tool Points to Line. Both shapefiles have the same projected coordinate system with a linear unit in metres. ...
0
votes
1answer
63 views

Adding m value to points using ArcMap? [closed]

I have used Points to line to create a polyline from a series of points. I want the points to have attributes with m values corresponding to the distance from the start of the line. There is also a ...
1
vote
1answer
41 views

Finding intersection point of point and polyline using ArcMap?

I have two shapefiles that looks something like this: One point file and one polyline file. I want to find the points where the points and line would intersect if you drew a perpendicular line ...
1
vote
2answers
95 views

Counting points in polygons using ArcGIS Desktop?

I have a table as follows: I have points and polygons. Every polygon has a variety of points inside. Some have 6, some have 12, some have 0. FID_2* is polygon ID. I would like to populate Count( 9th ...
-2
votes
1answer
30 views

Anyway to convert labels from a polygon layer to a point layer

I have a polygon layer of water bodies with a name attribute. I would like to create a points layer from the polygon that will display the water body names. I can't use the polygon layer to display ...
0
votes
0answers
148 views

Creating polygon data envelope using QGIS? [duplicate]

I've got data points (xyz data) of which I need an envelope in the form of a shapefile or polyline. I realize that there has to be done some form of interpolation. A method that approximately ...
1
vote
2answers
76 views

Delete all points outside the contour of a WMS raster map

I have two layers in QGIS. One WMS raster layer with a country map and one layer with points. It looks like this: I want to remove all the points that lie outside the contours of the country map, so ...
2
votes
1answer
97 views

How can I set QGIS “Random Points” density to less than 0,0001 (circa 100 meters apart)?

I have an input boundary vector layer (700 hectares); on it, I want to generate a set of random points (Vector/Research tools/Random points) with a reciprocal distance average of 233 meters, but the ...
1
vote
1answer
379 views

Select Points in a Buffer OpenLayers 3

I have a buffer that is made from a given point, and then I have points inside this area that I want to select. Was thinking I could use boundingExtent somehow but I don't get how the selection part ...
1
vote
1answer
86 views

Generating random number of points in each polygon based on polygon area?

I would like to generate random points in various polygons from the same layer in ArcGIS 10.2 (I tried the "create random points" feature), however I do not want the same number of points in every ...