A geometric element defined by a pair of x,y coordinates.
0
votes
2answers
32 views
add a vector point on OSM map
I have managed to show Lat and Lon
function init() {
navigator.geolocation.getCurrentPosition(function(position) {
document.getElementById('myloc').innerHTML="Latitude: " + ...
0
votes
2answers
48 views
Creating a 3D line feature based on 3D point features
In ArcGIS, is it possible to create a 3D line feature by drawing a line that connects 3D point features?
4
votes
1answer
105 views
QGis 1.8 fails to rotate point geometries with rule-based style
I have to do some visualizations in QGIS (1.8.0) and up to now I've been very happy with the new Dialog "Layer Properties -> Style", using the rotation-field to rotate Point-Geometries visualized by a ...
2
votes
1answer
79 views
Find projection of a point to a line
I have a segment defined by 2 LatLon points(A and B) and a third LatLon point (C).
I need an alghorithm, formulae, or some code to find the projection point of C on the segment AB (call this point D) ...
2
votes
1answer
119 views
Postgis 1.4 - Obtain closest point of point over polylines layer (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 ...
1
vote
1answer
114 views
Is it possible to filter points that dont make sense compared to neighbour points?
I have a point shape (10.000 Points). Before interpolating theses points I need to filter them with a statistical background. Is there a tool or something I could use? Is it possible to select / ...
0
votes
1answer
78 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 ...
5
votes
0answers
93 views
Moving points onto lines (~neighborhood)
I do have two vector layer, of which
one is a point layer based on "events" by remote sensing
and the second one is a line layer from local research.
In my case these are earthquakes and tectonic ...
3
votes
0answers
149 views
How to Batch Change X, Y Coordinate Number in ArcGIS?
I have a huge number of points (100000 points). Some of these have the same x,y coordinates. For example, 50 points are same in x,y then 100 points are same in another x,y coordinates and so on. ...
2
votes
0answers
72 views
Problems converting polygon to point
I'm trying to convert polygons to points with ArcGIS 10. My polygon layer has 2 attributes that I want to give to my point layer. I'm using the Feature to Point function from the Arctoolbox, but it ...
2
votes
0answers
55 views
Point file to raster
I have a point file of trees in my study area, which includes the attributes of each tree. Each tree also has a crown radius associated with it. I need to summarize the attributes of these points ...
2
votes
0answers
338 views
cant find point/polygon intersect using qgis (windows only)
below i describe the method i am using.
i have 2 machines: 1 ubuntu linux, qgis 1.4 - intersection works
2 WIN xp, qgis 1.8 - intersection dows not work
hopefully, someone will ...
2
votes
0answers
51 views
Adding points to represent non-chosen locations
I am looking for a way to set up a discrete choice model in ArcGIS for foraging behavior of individuals, in a grid of 15 locations. To do that I need a point for every possible choice they could have ...
2
votes
0answers
110 views
How does integrate work with point data sets?
I'm trying to combine point data into clusters and I think I've come up with a method that will work for what I want to accomplish. However, I don't understand why it works the way it does and I'm ...
2
votes
0answers
178 views
Updating SDE point feature classes with SQL SERVER 2008 R2
I am contacting you in hope that you can help me resolve an issue using SQL Server 2008 R2 to push updates to a SDE point feature class.
We are using a C# app that uses ArcGIS Runtime to edit the ...
1
vote
0answers
81 views
How to calculate average value within a polygon(in Qgis with Python)?
Now I have a point and polygon shapefile
and I want to calculate the points' average value within each polygons
How to do it with python?
I tried to find out but google gives me a lot of raster ...
1
vote
0answers
40 views
Join .csv file and .shp of georeferenced points
I have georeferenced a map and saved a selection of some points on the map. These points are cities of departure and arrival and I want to join the .shp with a and excel .csv with the information of ...
1
vote
0answers
60 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 ...
1
vote
0answers
44 views
Prediction a point position
I don't know if you could help me in this:
I have 7 points (x coordinate is known and variable) (y coordinate is known and fixed) each point represents a position of the same object in a specific ...
1
vote
0answers
79 views
Esri ArcGIS plot point
I have created a java function to plot the points on the map, and I need to pass the x-y coordinates and the taskevent as the parameters. I would like to ask what should be the input parameter for ...
1
vote
0answers
179 views
Create IPoint with Lat/Long in decimal degrees and Z in feet
I have written an ArcMap v10 AddIn that reads a folder of geotagged JPEG's and creates a new feature class where each point is the geotag information from on of the JPEG's. The issue is:
The GPS ...
1
vote
0answers
213 views
ArcGIS10 Split Line at Point Failing due to Dataset size
Im having an Issue with my Split Line at Point tool. Seems to run if lucky for 700 entries before arcmap/arccatalog falls over. Debugging of the errorlog has produced nothing. The total size of the ...
1
vote
0answers
62 views
How to find locations on a conditional search
Hope you can help
I have a set of points evenly distributed to 500m intervals, and stored elevation.
I want to find from a given location any other point with the lowest elevation within a 1,000m ...
1
vote
0answers
262 views
Error creating IPoint (ArcGIS 10) - Invalid use of New keyword (VBA)
I have some code I wrote in 9.3 that (mostly) works in version 10. I have a UIToolControl that buffers a user-input point based on a mouse click - nearly identical to the sample.
This used to work ...
1
vote
0answers
50 views
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 ...
1
vote
0answers
238 views
Moving GPS Points with a 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 ...
1
vote
0answers
241 views
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 ...
0
votes
0answers
29 views
Converting Points to Lines in ArcGIS AND retaining attributes of both start and end points
I have been searching and searching and I can't find a particular solution to what I need.
I have a table with animal location points. I need to calculate movement distances between points from the ...
0
votes
0answers
29 views
Assuming nearest point for a region
I'm mapping agricultural cropping systems in Brazil using QGIS. From satellite images I got an raster file with 5136 x 5136 pixels from my field work.
Now I need to associate many soil/climate ...
0
votes
0answers
31 views
How to add vertices to existing linestrings in mysql?
Is it possible to add a Point at the end of a Linestring in MySql?
For example I have a Linestring as
Linestring(1 2, 1 4, 1 6)
and I want to add a Point
Point(1 7)
at the end (output should ...
0
votes
0answers
50 views
Splitting a TAB file by attribute?
I have TAB file with LOADS of points. Each point as a unique ID and group assigned to it (ranging from 1-154). I'm wondering if there is an easy way to split this up into a TAB file for each group, ...
0
votes
0answers
74 views
How to insert vertex in polyline layer where we have a point in a point layer
I have a polyline layer and a point layer. Some of the points are on the polylines, but the polylines do not have vertex in these points.
How can i insert vertex there ?
0
votes
0answers
67 views
Can I write a query in MapInfo to select points within a certain distance of each other?
Example: I have 400 points. I want to make 4 different groups (roughly 100 points each) and I want the groups to contain the points that are closest, spatially, to one another.
0
votes
0answers
46 views
How to Draw a Point on a Geotiff in Android and Put it in the Postgresql Database?
I need to:
Open a geotiff in my phone (android) {offline)
Draw a point
Get it's coordinates (X,Y)
Fill in the data attributes (name of the point, ...)
Put the data and the coordinates in my ...
0
votes
0answers
43 views
How to format spreadsheet to input point data for later import to PostgreSQL
I want to create a spreadsheet to hold data from our cemetery. I will use the spreadsheet to get the data into a PostgreSQL database. What I dont know yet is the format that the point (positional) ...
0
votes
0answers
21 views
How to export Dispers Markers result?
I have many points in same x,y . i'd like to show , select by attribute and location . The result of disperse markres is a representation . It just show points and not save all of them in desired ...
0
votes
0answers
197 views
How to display points on map as a graphic using C#?
I have created map using ArcGIS Server in C#. I need to display points as a graphic.
my database consists of points lat lon values,
xval yval txnid attr1 attr2
...
0
votes
0answers
254 views
How to do a spatial join if QGIS 1.8 keeps crashing?
I am trying to perform a simple spatial join (adding polygon data to points) in QGIS 1.8:
target vector: points
join vector: polygons
take attributes of first located feature
keep all records
...
0
votes
0answers
79 views
Move or snap all annotation created from point layer
Et geo is a very good tool, I got angle from nearest line and i snapped all points to another line buffered with an exact position from the road ( 10 points 1:1500) some manual calculation was needed ...
