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

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0answers
8 views

I am trying to have markers in a KML to follow the direction of the view in Google Earth

I am trying to represent the flow direction of streams in a KML file to be used in Google Earth. As complex line symbols are not supported by the KML format, I have opted for a solution combining ...
1
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1answer
23 views

Merge vector points with point name into field name ArcGIS

I am merging several points gathered on GE, after converting kml into a shape file. I would like to have in the output file (merged) a field indicating the filename of the corresponding source ...
1
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1answer
29 views

How to select first coordinates in multipoint or in collection used for point reducing?

I am using PostGis and I have geometry like this: MULTIPOINT(1673118.56314624 5778263.30559826,1672914.41092247 5778129.131443,1672384.7731665 5778105.44570288,1673513.70724225 5778525.74090022) ...
1
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1answer
32 views

Comparing point pattern and raster data?

I have a simulated data set showing distribution of a certain habitat type as a point pattern. Then I have a empirical data set but there the format is raster. The two datasets are covering the ...
0
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1answer
12 views

How to discard sites when there is overlap between buffers?

I have 1,000 sites in a landscape that were sampled along a road. However, I think my sites are too close together. A lack of independence between my sites many be influencing my statistical models. ...
0
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1answer
34 views

How do I make two layers of point data align perfectly?

I have two point data sets that represent the same business locations, however, the points are slightly off for one of the two layers. As in one layers points are in the correct position over the ...
1
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1answer
30 views

QGIS- extract raster information into a point return nulls

I have a 1) raster layer and a 2) point layer. I want to extract the pixel value to each point, but it is not working when using this tools (QGIS): plug-in "Point sampling tool" (the new shapefile ...
3
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4answers
132 views

Tool to delete too many points in one area, ArcGIS, ArcMap

I have two layers: points and areas (buildings). In many places I have two or three points in one building. I would like to leave only one point in one building. How can I do that?
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1answer
16 views

saving a SVG marker to a layer for sharing

I have a layer which consists of point data. I have switched the symbology of the layer to a svg image that I loaded in. To maintain the symbology I went to LayerProperties>style and then i saved the ...
0
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3answers
38 views

Tool to find the nearest points in one layer, ArcGIS

How can I find nearest points in the same layer in ArcMap? I would like to find points that are in the distance of less then 0,5m.
3
votes
1answer
47 views

One attribute category defines colour, another attribute category defines shape

I want to set the point colour to be defined by one attribute (Lithology), and the shape to be defined by another attribute (Qualifier). For example, Lithology (RH) = Yellow, Qualifier (CR) = Square,...
1
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1answer
29 views

How to extract values from a raster stack within overlapping buffers?

In R, I have a raster stack with 6 variables. I would like to extract the mean and maximum value of each variable at 300 coordinates within a 500m buffer radius and a 1km buffer radius. In ArcGIS 10....
1
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1answer
72 views

Select points based on value and proximity

I have a set of points in a table, each has a value between 1 and 100. How could I reduce this to the point with the highest value within a radius distance X. So that no point is ever closer than X ...
1
vote
1answer
36 views

Move feature(s) causes points to be duplicated in QGIS 2.8.9

I have a point shapefile in QGIS where I am manually adjusting some of the points due to overlap. I am using Toggle editing --> Move feature(s) --> Save for all layers. Instead of moving the points ...
0
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0answers
17 views

Autopopulating point combobox using ArcPad?

Using ArcPad, I am capturing points that reside on a number of polygons with different asset IDs. How can I automatically populate one of the point’s comboboxes with the asset ID of whatever polygon ...
1
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0answers
27 views

Change point symbol to surface, Arcgis 10.2.2 [closed]

i would like to ask how can i change a point symbol to a surface. I have the capital city (point symbol) and i want to make it surface, for better cartographic reprepsentation. Im using ArcGis 10.2.2.
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1answer
24 views

How do I make a grid around all my points, and then convert it to a polygon [duplicate]

I want to make a grid around all my points, convert to a polygon and use this to clip the extent of my data. I am using Arc 10.2. How do I make a grid and then convert it to a polygon? Or is there a ...
1
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0answers
15 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
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1answer
46 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
vote
1answer
101 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
31 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 ...
8
votes
2answers
203 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
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0answers
23 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
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0answers
41 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
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1answer
28 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
38 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
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0answers
53 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
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0answers
22 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
26 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
66 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
21 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
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0answers
40 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
29 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 problem is it puts a point at every segment. When I give ...
4
votes
1answer
72 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
57 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
53 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
20 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
146 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
163 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
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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
50 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
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0answers
24 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
58 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
35 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
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0answers
11 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
27 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
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1answer
42 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
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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)...