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

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1answer
923 views

Generating Point from Centroid of Polygon falls outside of it?

I have a feature class of polygons within a geodatabase and I'm trying to generate points based on the centroid of the polygon using the Feature to Point tool in ArcGIS 9.3. However, I end up with ...
1
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1answer
103 views

Viewing a point geojson layer as markers in cesium

I have a point geojson layer and i would like to add and view it using cesium. I tried with the below code var dataSource1 = new Cesium.GeoJsonDataSource(); var roads = dataSource1.load('Apps/...
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1answer
34 views

Add features to point layer in QGIS 2.12

I work with QGIS 2.12 and i try to edit point layer by adding it more point features with "add feature" button. Here my point layer: after i add the features (features num. 58-62) i save editing. ...
2
votes
1answer
47 views

Plot a point at a user input distance perpendicular to a polyline

I have a straight polyline and the distances in metres of the points I want to plot perpendicular to that line. The points are all different distances and should be measured from a different point ...
1
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1answer
41 views

Snap or Move a Point to its closest attribute matching line ArcMap

I have a point feature I want to snap or move to its closes line feature. Now this is easily accomplished with the Near tool. However I want the Point with its unique name attribute only to move or ...
1
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0answers
30 views

Densification of Point Layer to get smaller Voronoi Areas

I'd like to densify a point layer to get a better spatial distribution. With "better" I mean homogeneous distributed. If I had to quantified my improvement, I would calculate the voronoi diagram and ...
1
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0answers
21 views

Deliminated layer cuts off imported spreadsheet at row 20

Platform: Mac, OS: Mavericks, Qgis: 2.14 Essen Exporting spread sheet from Excel as Windows .csv. No problem publishing points to map except that import will only process 20 of 23 row entries on ...
0
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1answer
27 views

Replacing each point in a point feature with a specific shaped polygon

I have many random points in one layer. I want to replace each individual point with a specific shaped polygon like the image below illustrates. Kind of like applying some sort of irregular buffer to ...
2
votes
3answers
139 views

Is it possible to delete geometry (create NULL) but retain the feature row?

I'm trying to perform the reverse action to "display x/y". I have a point layer displayed on the map canvas, and I want to delete a point's geometry, as in remove it from the map, but retain the ...
3
votes
2answers
76 views

How to create a fishnet, where each point from a point file is located in the middle of the individual grid cells of the fishnet

I have a point dataset in ArcGIS 10, and wish to create a fishnet, where each point is in the centre of an individual grid cell. Thus each point must be in the centre of a square. I have used the ...
27
votes
7answers
46k views

How do I create point features with exact coordinates?

How do I create point features with exact (manually entered) coordinates in QGIS? I get precise GPS coordinates from a survey team which I need to add to a point layer. What I want: -Add point, type ...
0
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2answers
48 views

Group points and compute area

In a point vector layer, how to compute area for 4 defined ranges of values of one attribute? On the example below, I want the total area for each of the 4 colours.
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0answers
17 views

Group points in polygons [duplicate]

How to group points into polygons? In Qgis if I want to render a point vector layer into a polygon layer, grouping all same colors.
2
votes
2answers
1k views

Tracing polyline between two points in ArcGIS Desktop?

How i can draw a line between two points...e.g.: I have initial point and endpoint and i need trace a line between this points...how i can do that?
1
vote
0answers
79 views

Python QGIS reliable intersection/overlap check between points and lines

In my script I need to check, whether a point I created stored in a memory layer lies on a polyline, which is in another memory layer. I am certain, that the point does overlap/intersect the line, ...
2
votes
1answer
48 views

Expand Street Network passing through points using QGIS?

I have a road network (red) passing through some traffic data points (green): I want to expand this network to include all of the points. I already have a bigger street network (blue) from which I ...
0
votes
0answers
347 views

How to add marker dynamically when clicked on map using OpenLayers 3?

I'm trying to add point (marker) on map click with custom style using OpenLayers 3. I tried this code, but nothing happens when user click on the map: var map = new ol.Map({ layers: [ ...
1
vote
1answer
73 views

orthogonal projection of a point onto linestring in PostGIS

I am trying to find the orthogonal projection of a Point (in 4326 SRID) onto a LineString (in 4326). The picture shows the objective. I have tried to use ST_Distance function, but in this case the ...
5
votes
2answers
279 views

Boundary from Points

I have a point cloud and need to process a very detailed boundary around the outer points. Is there a tool in QGIS? Convex hull is not detailed enough. Thank you!
2
votes
1answer
55 views

Trying to make many polygons from points? [closed]

I am trying to turns points into polygons, but I encounter this challenge : My data set has 1000 entries. Each entry has 360 associated columns, each with a coordinate pair. When connected, these ...
0
votes
0answers
71 views

How to load points in a SQL server polygon table?

I have a spatial table in SQL server which stores both points and polygons geometry and I am using the table to return geoJSON for API calls. I want to load some points to this table with shapetype ...
19
votes
4answers
8k views

Joining attributes from nearest point in QGIS?

I have two layers with points, call them A and B, each with different attributes. For each point in A I want to join all the attributes from the nearest point in B. Ideally this would also include ...
1
vote
1answer
258 views

Spatial Join in R

I'm fairly new to using R for spatial work so bear with me. I have found questions similar to this but nothing that answers this question specifically enough for me to implement it. I have point data ...
1
vote
1answer
645 views

Aggregate points with same values to polygons

I have a shapefile with 2M measurement points (each measurement point has a resolution of a 1/10). How can I aggregate points around each other if and create polygons out of it? They do not have to ...
3
votes
1answer
61 views

Point-to-point Link

I have a point layer of 64 points. Now I want a point-to-point linkage line layer containing 64*64=4096 lines. Is there a way automatically do that?
1
vote
1answer
39 views

Point coordinate shift after python toolbox processing

I am working on custom clustering in ArcMap. For it I have created a python toolbox, where I do the processing. However, as a result I get slightly shifted points (6-20 meters), while they shall stay ...
1
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0answers
19 views

Create pointe layer with table [duplicate]

I have a table with 13,000 points of geographic coordinates ( degrees, minutes , seconds) How I can create a layer of points ? QGIS or Arcgis . it is possible to create a layer of points with ...
7
votes
2answers
154 views

creating clusters of points with same attributes

I have a file of some 4000 points, which belong to around 400 different categories (species of rare plants). I would like to remove duplicates within the categories (which could be repeated ...
1
vote
2answers
244 views

ArcGIS Javascript Spatial Query with Lat Lng or X Y?

I am using Google Maps on the front end as all I need on this view is to show the points. When user clicks on the map in the view, it selects a point hence giving out lat and lng. I am trying to use ...
2
votes
1answer
42 views

Point-Line shortest distance and corresponding angle using FME

I want to determine the shortest distance and especially the corresponding angle from a point to a polyline. A solution using FME would be strongly preferred.
2
votes
0answers
43 views

Shortest path tool failed in QGIS

I'm trying to find the shortest path between two points (green and red points) on a road layer using QGIS 2.12.3. The roads layer has appropriate CRS. Before sign the "start" and "end" points I ...
1
vote
1answer
26 views

Creating points with co-ordinates in QGIS to upload to GPS

I have generated a random point within a set area. I have done this using the Google Maps plugin layer. The CRS is set to WGS 84. I want to get the co-ordinates for this point so I went into the ...
2
votes
1answer
44 views

Correlation of yield data within a buffer zone

Working with QGIS 2.12.1-Lyon, I am trying to compare one point (single shape file) with multiple others that fall within a buffer zone of 10m i.e. comparing one shape file with another. The end ...
1
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0answers
44 views

Creating Point Grid over selected polygon using OpenLayers 3?

I am trying to create an equally spaced grid of points. But these points must only be on land. I was using the polygon overlay of countries to see if I can use that as a mask. I have also tried ...
2
votes
0answers
77 views

Measure distance between points along a line in QGIS

I have a road network and different points connected to the roads. I would like to measure the distance between several points along the roads. Basically I want to do the same like the road graph ...
2
votes
1answer
16 views

How to extract values from multiple raster dataset from a location point in one single dbf?

Suppose I have 250 raster and my only concern is just a single point. The raster is arranged by ascending date. So if I extract a point value based on the order into one single file then I can graph ...
0
votes
0answers
36 views

many points to many line segments - and retain attributes of points

I would like to take a feature class of 22571 points (with time (in seconds), lat/lon and various other attributes but for now I care most about the ON/OFF attribute) and connect those points into a ...
0
votes
0answers
23 views

How do I reassign a point's XY value in ArcMap 9.3?`

I have a rectangle polygon I drew on a map and then added points to it's corner and midpoint. I drew the shape (representing a forest sample plot) where I thought it was best located based on 70 year ...
10
votes
1answer
11k views

Draw lines from points in QGIS

(I found here similar questions but they all reffer to ESRI's programs, and I use QGIS) I have a point layer and need to draw a line passing through or in the vicinity of the points (up to 0.5m ...
3
votes
3answers
3k views

Creating point to center of polyline?

I'm trying to create a points in the middle of polylines. The data is now in the form of shapefile. Is there an easy way to do this?
3
votes
2answers
3k views

How to easily enter a point feature in ArcGIS? (arcmap10)

My job requires me to enter point features into ArcGIS 10 which correlate to underground RFID markers that mark underground telecom infrastructure. Right now, the workflow requires someone to go out, ...
2
votes
2answers
38 views

Interpolation of point data with different scope

I need to interpolate a raster from point data (air pollution stations data). What I want to achieve is to distinguish the station's scope (or range or scale). For example some station's data are ...
1
vote
0answers
33 views

Colliding labels for point features in QGIS

I have a layer (point features) containing various points of interest (POIs), some of them have the exact same location. I would like to map these POIs and add a label showing their names. However, ...
2
votes
2answers
126 views

Anyone know where I can find a file like this for Pakistan?

Can anyone tell me where I can find a file like this on Pakistan? I found it on ochaonline.un.org I cannot find it when I search on there. http://www.scribd.com/doc/38714310/Afghanistan-Settlements-...
3
votes
0answers
59 views

How to move a point on a touch screen using esri map, dojo and javascript

I am new to map development. For touch screen devices, I need to add a point on an ESRI map and then move this point to other location on the map and get its coordinates.
1
vote
2answers
162 views

Rotate symbols perpendicular to line angle (ArcGIS)

I have lines representing curving streams (blue line in the Picture) and want to angle symbols perpendicular to the angle in their particular Locations (point features symbolized as red lines in the ...
1
vote
1answer
58 views

Create fishnet only where cells overlay point feature using ArcGIS for Desktop?

Is there a way to create a fishnet where cells are only generated where they would overlap a point feature in ArcMap 10.3?
2
votes
3answers
89 views

How do I create random points only within a multi-part polygon and none outside?

I am currently using a shapefile consisting of an area smaller than the entire study boundary ie. I want this to to be my overall study area. I used a raster to polygon tool and converted it to a ...
4
votes
1answer
3k views

How can I create a DEM from Point Data?

my boss gave me a small 3D-point-shape-file and asked me to make an DEM from it, wich I should put together with an older DEM of the same site, wich was made with Surfer. I created a raster-layer ...
12
votes
8answers
13k views

Extract raster values at points

How can I extract values from a raster by points. I prefer not in Arcgis. I prefer in Qgis or Mapwindow or other open source gis.