Measurement is finding a number that shows the size or amount of something.

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463 views

How to calculate accurate distances in Openlayers 3?

I'm calculating distance in OpenLayers 3 (3.9.0). I've got a function included in my project for measuring line/area features, basically lifted from the OpenLayers Examples. I'm using ...
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0answers
32 views

Get nearest polygons in both sides of a polyline with arcpy

I have polyline shapes representing roads and another shape layer with polygons that are representing buildings. I have to find some way with ArcPy to measure the distance from a point within the ...
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1answer
42 views

How to find cumulative length at points on a line?

I am working on a Modelbuilder project to teach myself how to use it. I do not yet have much knowledge in Python. I am currently a little stuck on the project I am working on. I have a line made from ...
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1answer
364 views

Get Radius in epsg 4326 with Openlayers 3

What is the best method for getting the radius of a circle in Openlayers 3 in epsg 4326 (geodesic)? I'm using this example for a base and trying to draw a circle while getting the radius, but using ...
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0answers
17 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 ...
6
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1answer
4k 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 ...
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36 views

Finding and changing measurement units using QGIS? [duplicate]

Using QGIS 2.4, I want to create 1,000m buffer around an object, but when I enter 1,000 as the distance I get something that looks more like a 100,000m buffer. I can enter 0.01 to get what looks ...
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1answer
56 views

Discrepancy between constructed line length and length recorded in attribute table in ArcGIS for Desktop?

Say that in an edit session I create a line of an exact length entered by keyboard - say 10' If I later measure that line using the measure tool, snapping to each end of the line, it reads 9.99998' ...
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1answer
475 views

How to calculate the average distance among set of points as measure of closeness

I have three series (or tables) of points in PostGIS which I want to compare. I would like to know how "close" each series is when compared to the other two. In other words I would need some measure ...
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1answer
127 views

Projection Transformations [duplicate]

Possible Duplicate: How can I measure area from geographic coordinates? I created my spatial tables in WGS-84 with SRID:4326, I want to transform them to UTM Projection to measure length ...
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51 views

Measure distance between points along a line in QGIS

I have a road network and different points connected to the roads. I would like to measure the distance between several points along the roads. Basically I want to do the same like the road graph ...
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1answer
42 views

How is width commonly defined for areal features?

Map generalization guidelines, for instance applicable to CORINE Land Cover or Polish BDOO databases state inclusion criteria for areal features like "area should be > 250 000 m^2 and width should be ...
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1answer
40 views

GeoDjango -How to store measurement data

Assume I have recorded the following values during a bike trip. One such dataset has been recorded every 5 seconds: timestamp, longitute, latitude, pulse rate, pedal frequency What is the best way ...
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1answer
2k 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
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1answer
823 views

Get XY coordinates in UTM from web-mercator where UTM zone is not known

How to get XY(northing/easting) coordinates in UTM where data is WGS_1984_Web_Mercator_Auxiliary_Sphere(WKID: 3857) coordinate system and UTM zone is unknown. For e.g. India falls under multiple UTM ...
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1answer
47 views

Advanced Digitizing Panel bad value or bug?

This is my first post here. What would cause the "Advanced digitizing panel" D (length) to show up wrong? I'm in the US using WGS 84 as CRS. If I add a feature (line) Advanced Digitizing Panels ...
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1answer
79 views

Why does not equal length of line in DIRECTION/LENGTH with length of line in MEASURING in OpenLayers 2.13?

My map projection is: "EPSG:900913" ,Display projection is "EPSG:4326" and units is "m", however does not equal the length in Direction/length with the length is calculated in measuring in OpenLayers, ...
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1answer
319 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 ...
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0answers
36 views

Measure building lean in ArcMap?

I was wondering if anyone is aware of any tools that are available to measure building lean in ortho images from within ArcMap. I am aware of calculations and processes that can be used to measure and ...
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1answer
119 views

Using measuring tool in ArcGIS

This is probably a very simple question - but opening up ArcGIS, the measure tool is unhighlighted, how do I make it so it is visible? Am I missing turning on an extension or something?
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1answer
131 views

Coloring multilinestringzm M values in QGIS

I have output from a geophysical technique that produces X,Y,Z and scalar value for millions of points, which have been stitched together appropriately (by networkx if it matters) into ...
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2answers
124 views

How to determine objects area (size) measurement error using satellite images?

I am working at scientific paper about measuring object's size (it's area) using satellite images. I got some progress in it and need to compare my results with other scientific works. I have found ...
6
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1answer
775 views

Measuring Right of Way in ArcGIS Desktop?

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 ...
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0answers
35 views

How can I measure the distance between many polygon features and either another polygon or a line in QGIS?

I often have to manually measure the distance between a single site and other sites around it, but obviously this can get long-winded and I feel like there must be a much more efficient way of doing ...
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2answers
3k views

Best formula for calculating short distances in UTM?

I'm fairly new at calculating distances with precision, but I wanted to know what is the best formula for calculating short distances in UTM coordinates. The distances that I'am calculating are all ...
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0answers
57 views

Measuring Geodesic Distance in ArcGIS for Desktop? [closed]

I'm working with only a basic/student license for ArcGIS 10.1 on an ocean mapping project. I've created a grid that covers all ocean area, capturing various characteristics within that grid (the ...
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4answers
288 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?). ...
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2answers
58 views

Labeling at M value vertices only?

How would one label at M value vertices only? We have added M values using linear referencing and now would like to label stations at the vertices.
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1answer
97 views

Closer for measureToolTip, openLayers 3

I want to add for my map measure tools. I added distance for line and square for polygon. Also i added erase for drawed element, but i can't to clear measureTooltip. First I try do it with ...
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0answers
138 views

Find the point distance along a streams polyline?

Working in ArcGIS. I am looking for a way to find the distance of a point along a streams polyline. I read Finding distance of point along polyline? and it seems to be similar to what I need...the ...
3
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1answer
75 views

Does the mean of latitude and longitude make sense?

The problem setting: I have a time series of geolocation data, namely latitude and longitude. I want to downsampling the time series and don't know if taking mean value of latitude and longitude ...
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2answers
152 views

Programmatically modifying ArcGIS Measurement object's units property

I am using ArcGIS's JS API for Measurement tool to measure and display Area, Distance, and Location points, but I cannot seem to be able to change the units programmatically. There's a method for ...
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1answer
69 views

How to get correct lengths when switching from GCS to PCS?

I'm working on ArcMap 10 and need to get the lenghts (in meters) of the segments composing my line feature class. GCS of the line is WGS_1984. Extent of this data should be: Left 11.236520 dd, Right ...
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1answer
157 views

Can you add the “measure” tool to model builder?

I am wondering if there is a way to add the measure tool, usually residing in the Tools toolbar, into model builder?
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1answer
386 views

Real-world dimensions of a 3D object in VisualSFM or MeshLab

I have a good-quality, precise 3D scene reconstructed from photographs/video by VisualSFM. All camera parameters, including 3D position and lens details, are known. Now, that the hardest work has ...
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27 views

Adding UTM to dijit measurement location in JAVA API

2 coordinate systems are shown when using dijit measurement by default. is it possible to add UTM to the Dropdownlist ? Here is the code : var measurement = new Measurement({ map: map }, ...
2
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1answer
418 views

Distance to nearest hub output not correct

In QGIS 2.6, I'm working with two point layers: center of the population per census tract and stores that accept food stamps. I'm using "distance to nearest hub" to calculate nearest food stamp outlet ...
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1answer
1k views

How to draw a circle in OpenLayers 2 and measure its radius dynamically?

With OpenLayers 2.13, I want to draw a circle and obtain its radius at each mousemove. The radius would then be returned as arguments of a callback function, for example. But of course, this is not ...
0
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1answer
57 views

Measure several line segments as one in ArcGIS

I have a polyline shapefile which is divided into more than 56 pieces and I want to measure the length of the whole line as one line.
0
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1answer
535 views

ArcGIS JavaScript API - measurement widget doesn't work with other widgets

I am having an issue with the Measurement-Widget in combination to other widgets with the newest ArcGIS API for JavaScript (3.13). With the sandbox, i was able to create a Map which includes ...
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1answer
107 views

Adding M coordinate with different measurings in PostGIS

I have a line table made of several linestring features in succession, so that all linestrings together would form one continuous line, such as: id | geom ----+----------------------- 1 | ...
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1answer
154 views

How to measure an irregular road line in QGIS?

I'm trying to measure the distance between some coordinate points along a road line from an OpenStreetMap source map, I am using QGIS 2.4.0. My problem is to find a way to measure these distances ...
1
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1answer
419 views

Measure length within vector grid?

I have a grid and some lines within a grid and I was wondering how to measure the length of the lines inside the grid. I can use the measure tool for a straight line, however in the future I will not ...
3
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2answers
5k views

Calculate line distances inside of polygons using ArcGIS for Desktop?

I'm working with two data sets: NHD polyline stream layer for my entire state HUC Watershed boundary Polygons for the entire state I am looking for a way to calculate the total length of streams ...
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1answer
59 views

Water diving and depth measuring equipment

We go to villages and forest to deepwell rig for water. Can anyone help in identifying a GPS and water depth measurement devices please? we do 4-6" deepwell rigging for ground water in mozambique ...
0
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1answer
108 views

How to know the real size of grid? [duplicate]

Im working with QGIS. When dividing a map with a grid I set in the paramters X=0.1 and Y=0.1. Could someone please explain what does that mean? I mean would the map be divided into 100mx100m squares? ...
0
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3answers
533 views

Measure Widget Issue - ArcGIS Javascript API 3.11

I am having an issue with the Measure Widget in my application after updating to 3.11. The widget does not appear after the application loads. I have checked my code and do not see an issue, also ...
4
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1answer
175 views

Analyzing spatial differences: conceptual and technical questions [closed]

My question is both conceptual and technical, but more conceptual than technical. It's a little long and multi-pronged, but I figured the best answers would consider everything, so thanks for bearing ...
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0answers
228 views

Calculate the distances between n geographical points

First of all, I'm sorry if my question is stupid, but I'm totally new to the world of GISs and geographic measurements. I would like to calculate the distances between N (an arbitrary number, but ...
2
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1answer
126 views

How to compute orthodromic distance in QGIS?

I have opened a geotiff file with QGIS. The CRS of this file is EPSG:3857 (web mercator). When I use the distance tool in the menu, the computed distance is towards web mercator coordinates and not ...