Geographic Information Systems

Questions tagged [bearing]

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A direction measured in angular units from some reference line. Also known as an azimuth or a heading.

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21
votes
3answers
31k views

Adding Direction and Distance into Attribute table

I just want to add direction (Bearing: i.e N 25 35 E) and Distance (Length: 125 meters) as my new field in polyline/line data. Is there a Plugin to generate these fields? I tried to used "Export/...
8
votes
3answers
17k views

Creating points based on distance and bearing from survey point using QGIS?

I am plotting witness tree data to calculate pre-settlement tree density. I have a shapefile with points along section lines (square miles) at each half mile. I am making another table that contains ...
13
votes
3answers
3k views

How to Create a Grid Inside a Polygon that is Oriented with the Longest Side?

I have been using a process called "Create Polygon Graticule" to create a grid within a polygon with assigned row and column attributes. It is a SAGA tool which I have been running in QGIS. It ...
5
votes
1answer
13k views

Applying proper conversion from True to Grid bearing

Assume that Grid North is 1.49 deg W of True North. Also, the magnetic declination is 13.11 deg. If I wanted to take gyroscopic surveys (measured from True North) and then convert them to Grid ...
4
votes
2answers
2k views

Variation of algorithms to find point from another point with bearing and distance

There are several algorithms to calculate distance between two latitude/longitude points. Haversine Hubeny Lambert-Andoyer Vincenty's formulae for inverse problem But there are not so many ...
4
votes
1answer
3k views

Coordinate systems and bearings

Ok so I've got a noodle scratcher and want some input before I open my mouth to my higher-ups. I recieved a new boundary description from a surveyor that uses metes and bounds in the form of bearings ...
3
votes
1answer
1k views

Drawing wind rose with QGIS from PostGIS?

I am working on wind rose data. I have some points on lines (streets) in my Postgres/PostGIS DB. The sample data scenario is: First, I computed street orientation of this line using PostGIS commands ...
2
votes
2answers
725 views

Visualizing updating lines of bearing from point?

I'm working on a project where I need to visualize a constantly updating line of bearing from a point, based on degree of rotation around that point. My plan is to design a line feature with an ...
0
votes
2answers
191 views

Generating multiple visibility bearings in ArcGIS as automated procedure?

As a relative newbie to GIS, I'm quite sure there will be a way to do this in GIS (probably most efficiently by writing a python script!) but (to me anyway) this is a fairly complex thing to do and I ...
4
votes
1answer
9k views

Calculate bearing between two decimal GPS coordinates (Arduino / C++)

I am trying to calculate the bearing just like in this example: Calculate bearing between two decimal GPS coordinates , but my environment is Arduino. I got the code translated (please see below), ...
1
vote
1answer
231 views

Obtaining bearings to polygon extents in ArcGIS?

In the context of a wider question, (Generating multiple visibility bearings in ArcGIS as automated procedure?) is it possible to extract bearing information from a particular point or set of points, ...
0
votes
1answer
749 views

Calculate velocity x and y components from Lat,Lon and Time

I'm trying to calculate velocity components in the X and Y direction given two points: P0 = (Lat0,Lon0,Time0) and P1 = (Lat1,Lon1,Time1) The points are pretty close together so the components ...
0
votes
2answers
291 views

Shapefile from heading and distance directions for property boundary

I have a survey with heading and direction points describing the boundary for a rural property in Brazil. I am in correspondence with someone there who needs a shapefile (I believe he mentioned kml or ...
0
votes
1answer
921 views

Calculating bearing of polyline in QGIS [duplicate]

I have a shapefile containing a lot of lines which I'm trying to separate based on direction. Is there any way to calculate the line bearing against a compass (in degrees or just as North / North-...