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

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1
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0answers
12 views

Create a correlation between different point dataset

I have different point data-sets in my map in ArcMap, but I am wondering if there is an tool in ArcMap that can analyze the correlation between the different data-sets. Specifically, I need to know ...
1
vote
1answer
40 views

Point buffer not round - jagged circle like thing

Any ideas why running a point buffer (50 and 150 meters) would result in this shape? ArcGIS 10.2 - All projections match
1
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1answer
77 views

How to add X/Y coordinates and count of overlapping points in a postgresql table?

How to add to my postgres/postgis table the following columns X coordinate | Y coordinate | count (number of points in same location) from an existing table populated with geometries type POINT
1
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0answers
25 views

Wrap the set of points to the minimum polygon

Given I have a set of points which represents the circles which are intersected. As result I'm trying to receive the boundary which represent the polygon which wraps all circles. Please take a look ...
6
votes
2answers
137 views

Automatic numbering of points during digitization in QGIS?

Does somebody know how to automatically number the points during digitization in Qgis. To explain, when I create the new point there is the window where I must to type the point number. Is there any ...
0
votes
0answers
18 views

Drawing line and finding bearing using ArcGIS for Desktop?

I need to draw a line from a point within a polygon to the edge of said polygon. I do not need to know the length of the line, only the bearing (in degrees) for the line. We are using ArcMap 10.3.1
-1
votes
0answers
30 views

help in syntax arcpy.PointDistance_analysis

I can`t run this syntax in Python import arcpy arcpy.env.workspace = "C:\\Users\\aseel\\Desktop\\Project_pointDistanc\\PointDistance.gdb" in_features = "base" near_features = "dependent" ...
0
votes
0answers
37 views

QGIS point displacement does not work as intended

Maybe I made a mistake, but I can't get it working. I have a CSV file with species-sightings and lot of them at the same locations. So to show all species I need to use point displacement. If I choose ...
1
vote
1answer
26 views

Verifying whether point lies on line or not when both given in GCS?

Googled and tried to look on Esri's forum but couldn't get anything. Rather got things which were verifying if the point is within a polygon or not. But I want to know, if I have starting point and ...
2
votes
2answers
33 views

Reducing number of attributes (classes of marks) in marked point pattern using R?

I have a marked spatial point pattern loaded in R (from Shapefile). This dataset has 4 different "classes" of marks: class A, class B, class C and class D. Each class of marks is categorical. One can ...
1
vote
0answers
44 views

how to create a grid of points within an irregular polygon with the maximum number of points?

I usually use qgis and arcgis. I need to create a grid of points within a polygon with the maximum number of points. I also need to set the grid parameters: x distance, y distance, offset from the ...
0
votes
0answers
13 views

How to statistically compare a point pattern to a model?

I have a point pattern which represents the damaged buildings following the earthquake. These data were created by online volunteers therefore I want to examine it's possible quality. Since there is ...
0
votes
0answers
21 views

How to define a study area for Ripley's K analysis?

I have a spatial point pattern which spans across multiple districts in the country. Now I want to examine its pattern using Ripley's L function. I know that Ripley's L function is used for ...
2
votes
2answers
18 views

Render rotated symbols in Leaflet

I have point with an attribute for each point's 0-360 direction. I need to render these points in Leaflet with arrows pointing in their respective directions. Is there a plugin or code I can use to ...
3
votes
1answer
64 views

Select by expression and remove points

How do I select points by expression and delete these selected points? Is it possible to do this inside the modeler with a tool? The selection by expression works fine but do I have to set all the ...
0
votes
0answers
16 views

What is the approach for comparison two spatial point sets on the global scale?

I have to point sets, both of them dispersed over my study area, which counts several districts. Now I want to find a way how to compare them between each other using spatial statistics on a global ...
1
vote
0answers
30 views

Algorithm to simplify a Polygon/Series of Points to a given number of Points

I have a polygon (or let's call it just a series of points). I want to simplify it (reduce the amount of points) to a given number of points. Currently I use Douglas Peucker and try to guess the ...
3
votes
0answers
22 views

loop distance point pyQgis

I have a .shp of lines where I'm able to calculate the sum of segments length but i'm trying to put a point at a given distance in meters. The probleme is it put me a point at every segments.. If i ...
4
votes
1answer
69 views

How to randomly position coordinates within a containing feature in QGIS?

I have geocoded address data, and I am wishing to randomly position it within the census tracts that they are in to obfuscate... So the points are still within the feature but randomly move around so ...
-3
votes
1answer
43 views

How can I create X_Y_Z_M point feature from xls file? [closed]

How can I create xyzm point feature from xls file? I m working on ArcGis10, I have also available QGIS. My end product will be polyline zm, but first I need to create correctly point zm. I have ...
3
votes
1answer
50 views

GIST slows down query?

I have an odd case where creating a GIST index slows down my query instead of speeding it up. The setup consists of two tables, one with multi-polygons, another with points. I want to calculate which ...
2
votes
0answers
19 views

How to generate random points from classified raster layer?

I need to generate random points using a raster layer, which is classified into 5 classes of TPI (terrain position index). This should be a stratified random sampling design, with an equal amount of ...
2
votes
3answers
122 views

Counting number of points within a grid

I'm trying to count how many floods occur within a given grid cell in ArcMap and I can't figure it out. I've been reading some other posts on here but I haven't been able to find an answer. I have ...
5
votes
3answers
162 views

Finding redundancy between two layers

Let's say I have two point layers that contain locations of wells on a property. layer A has 50 points. layer B has 35 points. Some of layer B's points already exist on layer A, and some of them ...
1
vote
1answer
21 views

Raster to point

I have a raster (5km pixel side) and I want to create a shapefile of points, one point per pixel (like a centroid), each point carring the correspondent pixel value. I run "RasterToPoint"tool in ...
2
votes
0answers
13 views

Export lines or graphics without losing the details / generate graphics without having lines overlapping [duplicate]

I am new to ArcGIS. How do I easily reproduce a spatial diagram such the one attached (Picture); from shapefiles on ArcGIS. I very often have to reproduce networks on Powerpoint at different scale ...
1
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0answers
42 views

Is it necessary to use hibernate-spatial for postgis?

I'm beginner in GIS. I have a database in PostgreSQL that contains a table location, that table contains a column with type point. I have to get points and display it on google map. Once I did the ...
1
vote
0answers
20 views

Measure the distance between points automatically

How can I measure the distance between points referring to the same element in an automated way? In fact I've imported in QGIS buildings downloaded from two different sources and obviously they are ...
1
vote
0answers
42 views

Find distance from points along lines [closed]

I have two layers, one is a point layer of schools and another is a polyline layer of streets. The end goal is to create a buffer along the lines that is 20 feet from the centerline that goes 1 mile ...
-2
votes
1answer
34 views

Create a point at intersection

I want to create a point at the intersection of two lines as it appears on the attached image. The red line is the stream network, and the green line is the 600m contour. I use ArcGis 10.2.2
0
votes
0answers
10 views

Set of points to multi polygon with specified distance

Is there any algorithm that can transform set of points to the set of polygons with defined maximum distance between points, especially I wonder if it is possible for inner polygons? Please, consider ...
2
votes
0answers
25 views

How do I merge a point attribute table to a polygon attribute table in QGIS or GRASS?

I have a point layer containing the following data: I want the following polygon areas to be added to the point attribute table as all the points occur inside the various features of the polygon ...
1
vote
1answer
37 views

csv points into raster using R

I have got the forest cover data of a region in africa (raster layer) and some data collected inside this region by a survey (.csv). In the .csv file I have got x,y coordinates and 3 other columns ...
1
vote
1answer
16 views

QGIS, Calculate networks first, diameters second

I need to get the following task done: First, various points (stored in a shapefile, identified by a common attribute) need to be put into relation with each other (see graphical scheme, steps 1 and ...
2
votes
1answer
13 views

Geotools : New points now drawn on the map

I'm using geotools v14.3 to load a shapefile (Java Swing application). I want to allow the customers to use the mouse to click on the map area to draw new points, lines and polygons. First, I'm ...
1
vote
1answer
40 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 = ...
1
vote
1answer
29 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
45 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
vote
1answer
34 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
vote
0answers
29 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 ...
2
votes
1answer
53 views

Determine if Point is in feature class attribute table

I'm working with ArcObjects, C# and ArcMap. I have an attribute table that has several rows of data including a "shape" field that holds a point geometry. I also have a random point. How can I iterate ...
1
vote
0answers
20 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
votes
1answer
25 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 ...
1
vote
3answers
37 views

ArcMap Random Points Minimum Distance Field not able to use units

I would like to create random points with a minimum distance based on an attribute field (polygons with a larger area need random points with more space between them). In theory this can be done. ...
3
votes
2answers
60 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 ...
2
votes
3answers
128 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 ...
0
votes
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.
0
votes
2answers
38 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.
1
vote
0answers
46 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
45 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 ...