Questions tagged [point]
A geometric element defined by a pair of x,y coordinates.
2,264
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What are units of Distance Matrix tool results in QGIS?
I have a point data set. Now there are cluster of points based on a field. So I take out one such cluster which has points with same field.I want to find distance between all the points in cluster and ...
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How to create zip code areas from point data?
I have a point dataset which has zipcodes for a certain region. This zipcodes have been marked on the basis of lat long collected. So each zipcode is repeated as it would be useful to show the region ...
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Creating polygons around extent of similar points using ArcGIS Desktop?
I've millions of points collected for lithology layer.
They have used a coding for different types of rocks.
I need to create a polygon around the extent of similar points.
What is the easiest ...
2
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2
answers
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Setting up drawing order for point shapefile
I am having a difficulty with creating polyline feature from a point dataset that represents a boundary. This dataset consists of 5084 points which are randomly ordered. I have no Network Analyst ...
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Simple PostGIS ST_Distance query for two points from the same geometry table?
Note: This question was published at Stackoverflow at first.
I have a geometry table points_table with SRID 4326 and a few points in it.
I need to find a distance between a pair of points (features) ...
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3
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How to create a efficent linestring out of geography points using postgis
I'm trying to create a linestring out of geography points. At the moment I'm doing it like this:
select ST_GeographyFromText(ST_Makeline(a.record_point)) from (
select (record_point::geometry)
from ...
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2
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Total great circle distance along a path of points
I am looking for an SQL query that sums the distances between a series of points using PostGIS.
The situation is as follows:
I have 2 tables: tracks and points.
Points belong to a track and thus ...
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How to create a graphic point by xy value?
I have implemented this code to create point event layer by xy text file, however I'm wondering how to create a point graphic by xy value?
This script draws point graphic by mouse down. When I steer ...
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Create point in intersections of two layers
I have two layers. One of them is 'Road_line' and another one is 'forest_shape'.
I want to create a point layer that has points in intersection of that layers. I couldn't find any tools for it.
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How to find nearest point for each point in current layer using ArcGIS Desktop?
I have a point layer and want to know the distance of nearest point of current layer for each point in the layer.
I found some tools in ArcToolbox about it , but they need two layers for input and ...
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Creating line (closest vertex to line) using ArcGIS Desktop?
I'm using ArcInfo 10 SP3.
I am working in reorganising our utility data. Two years ago, we have started collecting Private Service water line. We still have a lot of them to extract from old ...
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Point features disappear when adding new data
Recently while adding features to a point layer i noticed that once i had saved my edits the already existing points disappeared. Although not visable on the map all of them and their data were still ...
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Is there a way to have a single point feature with multiple records?
Is there a way to have a single point feature and have multiple attributes records associated with it? Multipoint approach won't work as it gives me one attribute set (database row). I am trying to ...
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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, ...
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How to automate point-in-polygon queries in ArcView?
Layer1 = point shapefile (multiple points, geocoded)
Layer2 = polygon (1 attribute; (1,2,3...))
I want a non-gis person to be able input a single address and be told the attribute of the polygon ...
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How to loop through an array of point features?
I have a set of point features and I wish to find the points that have common coordinates. Now I changed the code as shwon bewlo by using the IPoint and the compare method through a function. I have 2 ...
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Moving GPS Points with a VB script - Bearing works well but distance is wrong
I am using a script I found online created in 2003 by one of the commentators here. It is a great script and exactly what I have been looking for and I'm very glad to have found it. It simply takes ...
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Finding centre point of a raster in ArcGIS?
If I have, say, a rectangular and georeferenced raster file loaded in an ArcMap 10 document (.tiff w/ associated tfw), how do I easily find its centre point and store that point in a points vector ...
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3
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PostGIS raster value of a lat/lon point
I have a tiff raster in my PostGIS 2.0 database. I want to get the value of the raster at a specified lat/lon point.
I have:
postgresql-9.1
postgis-2.0-svn with raster support
a raster imported ...
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What are nodes in ArcGIS and how do you create them?
I want to create a elevation profile of a cross section so a polyline on ArcGIS. I wanted to regularly space around 1000 points per 1700m long xsection and extract elevation data for each node/point ...
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Converting points to raster in ArcGIS?
How do I create such map from point data?
I am using ArcGIS 9.3 and 10
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Computing UTM Zone from lat/long point
I am trying to convert a latitude/longitude point to UTM.
To define UTM projection, I need to calculate zone for the point.
I am trying to figure out the best way to do this.
One way to do this would ...
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How to Match Point Data in QGIS?
How do I match the same points (WGS84) in two different point layers? I want to get the points that lie exactly upon each other in the two datasets.
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Problem creating a point IFeatureClass
I'm trying to create a point IFeatureClass, but my code doesn't work.
Public Function CreatePointFeatureClass(ByVal featureClassName As String, _
ByVal ...
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Find points that lie within a set of coordinates
I have a PostGIS db, and I want to find the points that lie within some region (a bounding box). I have two sets of coordinates, from which I can get all four rectangle points that form the box (if ...
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Access points with PostGIS
I have a PostGIS table with linestring geometries and point (A) on it and I need to detrimine points (M) which located M meters from A. Distance is measured along linestrings. Any thoughts?
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Stacked point representation in KMLs
I cross posted this in the Google Earth forum but they changed the format there and I'm not sure I like the format.
In my dataset I sometimes have multiple locations at a single point.
GE will ...
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5
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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 a ...
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Select points within a given distance from a selected point
What I want to do:
In ArcMap, let the user select a point (not a point pre-enter) and enter a range (like a Message BOX can enter range)
the point (pre-enter the data and XY) within range will be ...
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How to determine a point lays within a polyline in arc engine?
I recently asked a similiar question on this, however I needed to know if there is a way to solve this if I only have a IPolyline Feature, and not the whole layer.
I want to know if I can determine ...
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Does anyone know a function to determine if a Point lies on a polyline?
ArcEngine 10 .Net 4 c#
I'm currently allowing user to select a point on a polyline and creating a point on the line. I am using snapping tool.
I just want to make sure that when the user clicks on ...
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Comparing two point shapefiles that contain lat/longs and compute distance using ArcGIS Desktop?
I have 2 sets of point shapefiles in ArcGIS Desktop (group A and B), each set has around 1000 entries that contain lat/long.
What I want to do is compare Group A against Group B and figure out for ...
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Creating circle in PostGIS
I'm using PostGIS 1.5.2, with geometries in SRID:900913. I need create a circles using a list of points as centre, with a radius of 600 kilometers.
I'm using this query:
INSERT INTO circles (geom) (
...
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ERROR 000212: Cannot create XY event source Failed to execute (MakeXYEventLayer)?
I have a csv file that is 133mb in size and has over 1.3 million lines of data. Each line of data has its own lat/long and I was wondering what would be the best way to display those points based off ...
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Creating points in interval 0.125 decimal degree using ArcPy? [closed]
I have a polygon shapefile. I want to create points at an interval of 0.125 decimal degrees in this polygon.
How can I create a script with python in ArcGIS 10 to automate the process of create ...
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4
answers
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Change number of decimal digits for features in ArcGIS 10?
I am editing vertices in polygons and points in ArcMap 10, and realised that they only hold 3 decimal digits for the X, Y coordinates, but I would like at least 6 decimal digits. Even if I type in ...
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Converting point data into a weighted raster
I am completely re-writing my question as i think it was quite confusing before:
I have a number of different points, each point has a -z value.
I need to create some sort of raster or a series of ...
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Label points at regular intervals using ArcGIS for Desktop?
I'm working with lines on roads represented by a large number of sequencial points.
Since labeling all of them would make the points impossible to identify, I'd like to know if there is a way to label ...
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0
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getting the correct location data with user input
I have some code others have provided, which I modified in order to run a Python script in a toolbox in ArcMap which accepts user input for a starting point, distance, and angle to create a shapefile ...
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1
answer
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Export list of coordinates in a points layer to spreadsheet?
This is similar to my previous question, but I would like to ask it for ArcGIS, instead of QGIS. If I am supposed to somehow merge the questions, please let me know.
With an existing point feature ...
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Getting list of coordinates for points in layer using QGIS?
I've got a layer in QGIS that is comprised of points. Its attribute table doesn't have (show) the corresponding x and y coordinates for each point. Is there a way for me to extract a list of ...
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Error adding buffer to polyline in ArcMap 10
As the next step to what I did in this previous question, I would like to add a buffer to a polyline, with 5 meters on either side.
I tried adding buffer to two versions of the line, one in ...
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How to connect points with a polyline in ArcMap 10?
I have a layer containing a few hundred points representing a survey track. The points are laid out in chronological order in the corresponding attribute table.
How can I have ArcMap 10 automatically ...
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Creating evenly distributed points within an irregular boundary
I need to create an evenly distributed series of points within a series of oddly shapped polygons (formerly squares, but now squares with donut holes).
The way I have solved this problem so far is to ...
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Point to raster Issues
I am creating a 3D subsoil model for display in ArcScene - I can get it displayed nicely as points but in order for the model to be easier to read I need it to be displayed as a raster.
Every point in ...
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For a given feature find the closest point along a given path
Looking for a Java based (foss4g) solution for the following:
I am using a path along with a buffer to find features that are along the path. For each of the features returned I want to find the ...
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Calculating latitude and longitude of points using QGIS
How do I easily calculate the lat/long of points using the QGIS Field Calculator?
I saw a previous related question (Using QGIS API and Python, to return latitude and longitude of point?), but it ...
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Finding distance of point along polyline using ArcGIS Desktop?
We need to find the distance of a series of point along a given polyline.
We have a polyline dataset repsenting rivers in a catchment, broken up into river reaches (FID 1 through 35 for example).
We ...
user2040
6
votes
1
answer
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Interpolating irregular shape, merging DEM's using ArcGIS Desktop [closed]
My problem is quite complex, but I hope that solution may be simple or at least possible.
I do have .img DEM 0.5x0.5m. DEM consists of river bed, river valley and adjacent areas (it is strip of 5km ...
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3
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Spatial Database Design (PostGIS) - Point data that doesn't always have spatial data
I am creating a spatial database using PostGIS.
I am storing the attributes and location of some species records that can be represented as points. The records are recorded from either:
a) static ...
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