The measurements tag has no wiki summary.
1
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1answer
137 views
Find closest point from origin in QGIS and display measure line in composer
I have a location point. there are several constraints areas surrounding the point. Is there a way to calculate the closest point of this constraint from my point and to display the distances as a ...
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0answers
33 views
OpenLayers Vector Line Feature hard to select
I have a measurement control on an OpenLayers map which allows the user to (unsurprisingly) measure lines and areas on the map. They draw the line/area they want, OpenLayers does the measurements ...
1
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0answers
45 views
Projection for Tracking a Vehicle
I'm looking for the best coordinate system projection to use for cartesian calculations while a vehicle is running from its starting location to about 100 miles from that spot.
The offline format ...
0
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1answer
63 views
QGis different results between $length and measureing in the map
I use QGIS Lisboa and need the lenght of some shapefiles. When I use the field calculator the results are always around 30 % higher than in real, also than a measuring in the map.
Does anybody have a ...
1
vote
1answer
59 views
Can the units of the measure tool in QGIS be changed?
All,
I'm trying to do some error-checking with some rasters I'm creating, and want to measure line distances on the map in feet, rather than meters - which is what the measure line tool seems to be ...
2
votes
2answers
56 views
How do I calculate acreage grouped by owner, masked by a poly?
I have statewide land ownership data and have created a mask to project ownership for only one county. I need to calculate the acreage of each owner within that county. Is there a quick way to ...
3
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0answers
50 views
Detect connections along shapefile in QGIS?
I have a set of polylines and a set of points that lie along or very near to the polylines, and I need a way to measure which points are connected to each other along the polylines, and what the ...
4
votes
1answer
378 views
OpenLayers measure tool - instant measurement
I need to use measure tool to measure distances (instant measurement!) in my application. Instant measurement example can be found here. But the main problem is that when I use instant measurement ...
4
votes
1answer
100 views
Measurement not correct in QGIS 1.8
I have a SHP file of sub-areas of U.S. counties (roughly about the size of a Census tract) that I've reprojected into a 'true distance' projection (World Equidistant Cylindrical) in QGIS 1.8. However, ...
3
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1answer
353 views
Measurements in QGIS 1.8.0
I am using qgis version 1.8.0. My project contains tiff and several "shape" layers. The CRS is WGS 84 (EPSG:4326). I am attempting to measure the areas of the layer polygons. However if I click on the ...
3
votes
4answers
192 views
How to measure without coordinates?
My current Project is to "map" a turntable in qgis. I know, very unlikely but that's what my teacher wants.
My teacher also wants me to measure something in this project (Very specific, isn't it?). ...
2
votes
1answer
212 views
How to meassure the length of common edges between polygons?
I have a shapefile that contains several polygons which in fact represent the limits of several counties. My task is to find each length of each shared border. So in other words I want to know how ...
2
votes
1answer
212 views
Does anyone know how to get the QGIS Web Client measure tool to show units in feet and miles?
Does anyone know how to change the QGIS Web Client measure tool (distance and area) so that it shows feet or miles rather than meters?
5
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1answer
143 views
Literature on public transit network connectivity metrics
Are you aware of any literature or best practices for measuring the connectivity of a public transit network, taking both route geometry and the schedule into account?
In other words, I'd like to ...
2
votes
3answers
917 views
Distance between a line layer and several other line features (arcGIS 9.3 Arcview Licence)
I have a "Drain" line layer (with 150 lines) that I need to calculate the distance from lines to all objects within 120m. I've tried doing a spatial join and its great but I need more than just the ...
11
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2answers
2k views
Using Geodesic Measurements for Circle Radii?
I am currently developing an OpenLayers mapping site. Measurements can be made using a line tool, and an area tool. Both of these are currently set to calculate geodesic measurements as outlined in ...
4
votes
1answer
191 views
Closing MeasureTool Window
I'm activating the built in ArcGIS measure tool using the following code:
ControlsMapMeasureTool measureTool = new ControlsMapMeasureToolClass();
measureTool.OnCreate(_axMapControl.Object);
// set ...
6
votes
2answers
1k views
Measuring distance between points in ArcMap - what coordinate system to use?
This is a basic -newbie - question. I have some handwritten data points taken off a GPS - so I am assuming they are in WGS 84, and I want to load them in ArcMap 9.3, via excel, and measure the ...
5
votes
1answer
2k views
Is it possible to display the length of each segment with the Openlayers measure control?
I am trying to make a OpenLayers measure tool that displays the length of each segment on top of each segment and the total length of the measurement as shown below:
I have used this example ...
3
votes
2answers
564 views
Measure the Length of a Line on a Map after a MOUSE_MOVE Event
One of the actions a user can perform using the ESRI Flex Viewer application is to draw a shape on a map (e.g. a line). Once the user is finished drawing the line, they will double-click the mouse ...
5
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1answer
235 views
Geometry Calculation
Wanted to ask about accuracy of areas calculated by GIS compared to actual ones on ground. Because I have data of my country without areas for the districts within Uganda. Are the areas obtained using ...
3
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2answers
4k views
Cannot get areas for polygon layers in ArcMap 10
For an ArcGIS project opened in ArcMap 10, we have added polygon layers representing different geographical features.
After all the polygons were created, we opened the attribute tables for those ...
6
votes
1answer
490 views
Is it impossible to measure Right of Way in ArcGIS?
I'm helping bring CAD people into ArcGIS so that everyone throughout the company is on the same page and there is one database for everything. Right now, one of the biggest hurdles is making sure all ...
3
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0answers
111 views
Where does “Update measurements” put its updated measurements? (MeemsTools)
I have several .shp files loaded into MapWindows GIS. I go to plug-ins > Meems Tools and click on "UpdateMeasurement Plugin", and it loads. I click on the Update measurements, and in the the Update ...
