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

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1answer
21 views

Assigning irregular points to a grid and assigning grid number as attribute

I have a large point data set that has irregular geometry (random sampling) that I want to bin in 2D XY space. I've attached a sketch below to illustrate what I mean. Apologies for hand drawing, hope ...
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3answers
58 views

Create continuous raster from point values in 10.1?

I have a point dataset of nearly 400 points containing percentage values the point is representing Is there a way to create a smooth continuous raster surface across the whole of the UK of the point ...
4
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1answer
97 views

How to find the distance from a point to a polygon, via another point, in R

I am trying to calculate the distances between a central point, and the edge of a polygon, along straight lines drawn between the central point and another set of points (where necessary extended ...
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0answers
133 views

ArcMap Point Distance giving decimal degrees even when in projected coordinate system

I'm trying to calculate pairwise river distance among 60 XY coordinates in a small region of Mexico with ArcMap 10.2.2. I have defined my projections and projected both my stream network and XY ...
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0answers
779 views

Bearing Distance to Line tool from dBASE table only draws one line in ArcGIS 10 [on hold]

I am using the Bearing Distance To Line tool to draw geodesic lines to points defined by a bearing and distance. This is an aside, but I will then use the Feature Vertices To Points tool to convert ...
1
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2answers
202 views

Calculate nearest feature with a barrier

I have three shapefiles: a) polyline with rivers and streams (also as polygon available to me), b) polylines of highways and roads and c) point file with locations in the riparian vegetation. I want ...
4
votes
2answers
160 views

Convert vector point data (shp) to raster (tif) using QGIS

Overall Question: How can I get the rendered tif image to keep the modifications seen in the image produced by map canvas? I am writing a standalone Python script. I have simplified my code below ...
1
vote
1answer
456 views

How can I move two layers at once in QGIS?

I'm trying to move two digitized layers, one containing points, the other polygons to a different location at the same time. QGIS doens't seem to allow this. Even if I select both layers and features ...
4
votes
2answers
120 views

Rotate symbols perpendicular to line angle (QGIS)

I have lines representing curving streams and want to angle symbols at various points on the streams so that they are perpendicular to the angle in their particular locations. What QGIS seems to do ...
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0answers
23 views

Is there a way to combine clusters of points into one point?

So I have a large point dataset, and need to put buffers around the points. However some of them are too close together (the buffers overlap too much), and so I'd like to combine all points say within ...
1
vote
1answer
358 views

Creating polygons layer from point layer with conveks buffer

I have a point layer of >750000 points representing dwellings with district heating. Now, I want to create polygons for every n of points with a distance of n meters to the next point. I have a ...
3
votes
2answers
550 views

How to obtain closest point of point over polylines layer in PostGIS 1.4 (without st_ClosestPoint)?

I´ve got a polylines layer (pipes) and a points layer (valves) and In Postgis 1.4 I would like to obtain the closest points but exactly on the closest polyline. In other words, i need to locate each ...
2
votes
1answer
65 views

How to create azimuth raster layer by pyqgis?

I want to create an azimuth raster layer base of single point shapefile, for this I write below code that create a memory point layer that each point in memory layer is center of each pixel and have a ...
7
votes
2answers
962 views

Normalizing point cloud data

How I can get Digital Height Model (only object heights, DSM - DTM = DHM)? Many applications can do this, but they convert it to GRID or TIN format. I was wondering if it was possible to keep the ...
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2answers
425 views

How to extend polylines to the nearest point

Hi could anyone tell me a way of getting my polylines to search for a point within a certain number of meters of their start/end points and extend to it? edit: There was some broblem uploading a ...
0
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0answers
28 views

Determining point distance along river in ArcGIS?

I have two sets of data: River networks -> line data Fish movement data -> points along the river Is there any way to calculate the distance between the points along the river distance, which is ...
0
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0answers
18 views

Comparing multiple point datasets to polygon dataset?

I have multiple point datasets indicating presence absence and i want to compare them all to a polygon dataset to calculate cumulative score for the polygon i.e. presence of points in 2 point datasets ...
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2answers
33 views

Points not displaying in feature class in file geodatabase

I was working with shape files when I recently decided to put all my shape files into a single file geodatabase. I just tried to add some more points to the feature class by inputting the coordinates ...
2
votes
2answers
2k views

Using NetCDF for point time-series observations?

I have a large growing dataset of water and climate observations for several years in regular hourly time-step. The number of locations is cca. 1000 locations with latitude, longitude coordinates. At ...
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2answers
444 views

Density analysis producing extreme values?

I have point data of gas flares and I am trying to create a simple density raster of those flares. Results are either 0 or in the 100,000-1,000,000 range (when there's 5 to 40 or so points in each box)...
1
vote
1answer
58 views

From a lat/lng point, load data clusters of other lat/lng points within radius using PostGIS

Very similar to how Zillow's mobile app mapping search works, I'm trying to pass in the lat/lng points & radius (meters) of a single user and then, on the fly, generate clusters to enable passing ...
0
votes
1answer
269 views

How to I cluster by features in CartoDB?

I have a set of points for a number of buildings in NYC. I would like to group those points into clusters per their respective neighborhood (ex: Chelsea, Upper East Side etc.). Each of my points have ...
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2answers
32 views

How do I convert a fire frequency point shape file into a fire frequency raster?

I have a point shapefile that I want to convert to a raster image using ArcMap 10.2. The shape file has a number of points on top of each other. Each point is a fire. I want to make a fire frequency ...
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1answer
24 views

Generating points along perimeter of circular feature in ArcMap? [duplicate]

How do I generate equally spaced points on the circumference of a circular feature in ArcMap? I am currently working on a project where I need 36 equally spaced UTM coordinates that form a silo.
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0answers
25 views

How to interpolate a set of waypoints?

I am trying to interpolate a Vector Layer in order to have as many waypoints as possible. I am doing it with the Interpolation Plugin, but I don't know what to do with the Raster Layer generated (I ...
1
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3answers
87 views

Convert raster to a CSV values and lat long based on raster value in QGIS

I am looking to convert a raster into a csv file (or tab delimited) based on values in the raster (Value > 0). The csv would have three values, latitude of center of cell, longitude of center of cell,...
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0answers
15 views

QGIS Point Features and Labels Not Appearing in .KMZ/Garmin

I want to produce a Garmin custom map for use with my Etrex 20x. I'm working with QGIS 2.14.3-Essen using the GarminCustomMap, version 1.1, plug-in to produce the output .KMZ on a Mac running OS X ...
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0answers
20 views

QGIS Points to path using

I've one question or maybe two about Points to path in QGIS. First, I present my case: I have to do "travel paths" from one address to another address. I have a database - example: How I should ...
0
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1answer
33 views

Single point creation

I am using arcpy.CopyFeatures_management(pointGeometry, "output") to create singles points. Is it possible to create those single points on an existing output without deleting the output before the ...
1
vote
1answer
48 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
votes
1answer
22 views

how to create a grid - create a line of points - in ArcGIS 10.2

I would like to create a line of points spaced at 1km intervals along each of the four edges of my DEM, I was wondering whether there is a way to do this automatically in ArcGIS 10.2 and if so, how ...
1
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0answers
24 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
26 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 ...
3
votes
2answers
11k views

Adding points to point vector layer using QGIS?

I have a point layer with multiple data points in QGIS, but I want to add some extra data points to it and adjust some info that we missed because the ground was wet and we needed to go around it. I ...
1
vote
1answer
39 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) ...
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0answers
29 views

Defining and exporting a path from discrete points in QGIS

I'm working with elevation data (NED, SRTM, etc.) in QGIS and I'm wondering how I might be able to pick a set of points from my map and export the coordinates to something like CSV? For example, I'd ...
0
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0answers
23 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 ...
0
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1answer
15 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
votes
1answer
241 views

How to create soil-type maps using QGIS

I am trying to create a soil-type map of an area from point data using QGIS. I tried interpolating the data, since soil is continuous. I did this by allocating a number to each point type and then ...
0
votes
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 ...
0
votes
2answers
212 views

Create point on a line with given distance from end in PostGIS

Does anyone know how to create points along a line (MultiLineString geometry) with a given distance in PostGIS? I'd like to create points at a regular distance over a line, which represents a ...
2
votes
1answer
2k views

Better way to get raster values for a large number of point features?

I have several projects with tree point features (SpecialStatusSpeciesPoint) that contain up to 2,000,000 records. I am trying to record tree height (Hgt) and base elevation (BaseElev) values, based ...
1
vote
1answer
65 views

How to get attributes from line-polygon where points are snapped on, into the point-layer?

I have a SQL Server spatial table with point-objects, the points are set by snapping onto a line SQL Server spatial table. so the points are georeferenced on the line. How can I get the attributes ...
1
vote
1answer
36 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
votes
4answers
138 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
19 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
40 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
121 views

Interpreting results of QGIS intepolation and Heat map from point shapefile

I have taken a step interpolation and heat map of the data point shapefile (building Centroid) with QGIS ver-2.8.1, as shown below. My question are: What is the difference of the two methods? How ...
3
votes
1answer
48 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
vote
1answer
40 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....