Questions tagged [direction]

The distance-independent relationship between two points in space that specifies the angular position of either with respect to the other

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Slope direction impact in least cost path [closed]

How is slope direction impact hiking path? I know about velocity slope functions like Tobler, Langmuir and so on but can someone explain how direction of the slope affects our hike and why it is ...
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4 votes
2 answers
224 views

Detecting and making all connected lines in the same direction in QGIS

I have a list of straight roads segmented which has a unique "ID". I would like to detect connected lines in the road network and make them in the same direction instead of reversing them ...
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Interpreting Camera GPSYaw to Geographic Direction

If the GIS SE is not the place for this question, please point me in the right direction. I have been extracting the geographic information from a number of photographs. This spatial information is ...
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Extracting specific corner of a rectangular polygon based on the cardinal direction

I have a dataset of rectangular polygons that have an arbitrary cardinal direction attribute (N, E, S, or W) assigned during digitization. The polygons aren't necessarily exactly rectangular. I want ...
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Naming convention for ways of defining direction

The following two conventions for defining direction are very common, but what are they called? 0 at north, clockwise 0 at positive x-axis, counterclockwise Background: I'm writing a function that ...
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Why the wind shows the opposite direction than what it should display

I am having trouble with my wind display, I am currently using GrADS and I have two data from AMPS and ERA5 showing the wind speed and magnitude over the Antarctic Peninsula area. However, after ...
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Counting lines in polygon using ArcGIS Pro

I want to determine how many lines go in which direction (north, east, west, south). Is there a simple way to do that in ArcGIS Pro? Unfortunately, I have too many lines to count them all by myself. I ...
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PostGIS: How to find Nearest Neighbour but only within a direction range?

I am attempting to find the nearest neighbour to a geometry in a certain direction but am becoming stuck at the planning stage. I understand the basic tools that I need but am failing to find anything ...
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Calculate Rhumb-bearing applicable for showing directly pointing arrow in EPSG:3067?

In short: A pointer from one point towards another, angle calculated with any Bearing tool / formula in hand, did not show correctly, but some degrees wrong. Calculate made in lat / lon values and ...
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3 votes
1 answer
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How to follow oneway directions using sld?

I want to show oneway directions of streets using SLD in geoserver. I follow this instruction but i still have a problem with directions of arrows. Most of all arrows get south to north and west to ...
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Creating a loop itinerary

I am trying to find a way to create a loop itinerary. For example, I know my starting position, and I want to walk some distance and come back to my starting point. It's quite easy to find itinerary ...
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2 answers
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What does QGIS arrow direction mean?

Is the base from the first point of the vertex to the last one?
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Creating vector gradiants showing magnitude and direction by taking input of two rasters in QGIS

I have two binary rasters and I am focusing on pixels having value 1. Now, I want to know show direction and intensity from which pixels (having value 1) of one raster is shifted other raster. ...
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Identify incorrect direction of travel of Polyline

I was trying to work on a simple way to identify incorrect direction of travel of polyline as compared to base map. However was unsuccessful. I tried few plugins but didnt get anything to help me with ...
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7 votes
1 answer
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Label direction check

I want to visualize direction of river's course by an arrow placed next to the river's name label. I have an idea to place the blue arrow as a text in front of my label or at the end of my label, but ...
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562 views

Adding arrows to hydro line to show direction that river is flowing using ArcGIS Pro

I have a large number of rivers and streams on my map which do contain elevation data in the attribute table. I would like the lines on the map representing the rivers to have small reverse arrows ...
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How to find all cells within a neighborhood with slopes towards the center?

I would like to iteratively go through each cell in a raster in arcGIS that meets criteria (already established as per below description) and find the percentage of cells in a several km neighborhood ...
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Check direction of linestring against corresponding polygon using SpatiaLite

I have a polygon and a linestring that is part of the polygons boundary, but not necessarily digitized in the same direction as shown here: In this case the linestring runs in the opposite direction ...
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Finding the orientation of location

I'm wondering if there's some way to find the orientation of a set of points along a line as a number (degrees from north) in ArcGIS?
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Flipping digitized directions of geometry based on route measures using ArcMap

I have a feature class that has a schema like: routeId, fromMeasure, toMeasure, attr1,attr2..etc within a given routeId, the segments flip directionaility many times and are not consistent. I would ...
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-1 votes
1 answer
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Why there is a different relative to Geodetic Azimuth from Arc Map from the original datums and transformations?

We where conducting a displacement for some BM (Old vs New values), we made calculations on different platforms for the North, East, Elevations. We used the NGS NCAT, Inverse 3D, TBC and manual ...
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1 answer
141 views

QGIS Live GPS - turn the map according to the direction I move

Using Live GPS in QGIS I would like the map to be rotated automatically, that the direction I am moving to is always upside like in a car navigation sytem. How can I configurate that?
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2 votes
1 answer
324 views

Using Live GPS in QGIS - Speed and quality is not shown

I am using QGIS 3.10 together with a ArdusimpleRTK2B Board based on U-Blox ZED F9P processor and a Windows 10 based tablet computer. Using a SAPOS correction service and having connected it via gpsd ...
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2 votes
1 answer
208 views

Generating polygons that represent intercardinal quadrants (NE, SE, SW, NW) at Road intersections using ArcMap

I have a road polyline feature class in an Oracle 18c/10.7.1 geodatabase. I would like to generate a polygon FC that represents the quadrants of the road intersections. The polygon FC would have a ...
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Finding Segment information on a Route between 2 places

Is there a way to find Segment information on a Route between 2 places using Google Maps API? I have 2 places/addresses/latlong. I am looking for the direction between the two. For this direction, I ...
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2 votes
1 answer
112 views

Displaying direction arrow on pointstopath in QGIS?

I found Displaying direction of movement with points2paths in QGIS? which should work but it doesn't. It looks as though it's an older version of QGIS (I'm using Madeira). Arrow gives a very strange ...
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Calculating distance between two feature layers in specific direction using ArcMap?

I'm working on a project in which I'd like to calculate the distance from specific locations within a city (points) to the nearest body of water (polygons) following the path of the wind (direction). ...
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Listing grid cell numbers for outlet according to flow direction using ArcGIS Desktop?

I am trying to list grid cell numbers whose flows contribute to the red cell I draw in the figure according to the known flow directions. Directions and colors are shown in the figure. What tool can ...
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2 votes
1 answer
383 views

Compare two points and conclude direction

Is there a simple method in geotools or JTS to conclude the direction between two geospatial points? I would like to conclude if point A is (north, south, east, west, NW, NE, SW, SE) when compared ...
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1 vote
1 answer
120 views

Getting angle of point generated from DEM in Raster using Field Calculator in ArcGIS Desktop?

I am trying to calculate the angle of some specific points generated from flow direction in ArcMap 10.2. I converted the DEM to flow direction and then to points. I am trying to convert the grid_code ...
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1 answer
490 views

How can I calculate the direction of a Google Maps polygon?

To create a hole in a polygon, you need to know if the inner polygon is in the opposite direction as the outer polygon (See here). How can I calculate this? Here are some examples: var ...
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6 votes
1 answer
977 views

Change MultiLineString direction in QGIS/PyQGIS

I am looking for a method in PyQGIS (QGIS3.x) of reversing the direction of a MultiLineString feature. If there is more than one part, the order of the parts should be reversed. I have found a ...
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3 votes
1 answer
1k views

How to create a symbol with directional arrows in QGIS 3?

This is the same as this question for ArcGIS: Creating Directional Flow Arrows for sewer lines? but for QGIS. I tried to follow the same approach as in ArcGIS, but I keep missing the mark. I think I ...
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4 votes
1 answer
440 views

Calculating polygon main direction and creating line out of it

I would like to find out the orientation of a polygon and create a line of that direction.See image below.
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1 vote
1 answer
834 views

Direction of two lines (turn right or left)

There are two connected lines (EPSG:4326 line1, line2). When the direction of the two lines is from line1 to line2, I want to do a calculation to determine whether the direction is left or right.
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2 votes
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Using ArcGIS API for JavaScript 3,X Directions widget?

Can I select only one country in the Directions widget in ArcGIS API for JavaScript 3,X? For example: I want to select only UK. If the user writes Spain he will find nothing.
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3 votes
1 answer
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Dissolving lines with same directions using ArcGIS Desktop?

I have a feature class containing road polylines which has to be dissolved by some fields. But recently noticed that if some road has same atrtributes but different directions, Dissolve tool doesn't ...
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1 vote
2 answers
61 views

Acquire direction between points along route

How can I generate a directionality attribute between two points along a route/line? Currently I am using Network Analyst to determine closest facilities, but I need a direction (upstream/downstream) ...
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8 votes
4 answers
10k views

Changing (flipping) line direction in QGIS

I have a river network in QGIS. I draw opposite direction of one of the rivers. Now I want to change the direction of that river. How can I do that in QGIS 3? (As I know it is flip in ArcGIS)
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1 vote
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Computing mean direction of river network in R

I have a shapefile of a section of river network (polyline) which I have read into R using the sp package to have a SpatialLinesDataFrame. I also have access to a terrain raster for the region in ...
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1 vote
1 answer
657 views

Get minimum distance direction from point to line

Is there a method using QGis to calculate the direction (degree) of the minimum distance from a point to a line. I already have: - Point shapefile with hundreds of points; - Linear Shapefile with ...
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3 votes
1 answer
2k views

Generating KML with arrow styling?

I have a Network GIS which I have made in QGIS and has direction arrow, but as soon as I export it to KML file I can just see the polylines without the direction. Is there a way to get the ...
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2 votes
0 answers
905 views

R Leaflet plot ship direction

I want to plot ships and its direction on the map using R Leaflet. I tried to represent a ship as a circle and its direction with a line from the center as in the following picture. The problem is ...
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1 vote
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170 views

Directions based on polygon centroid and average/median point of adjacent polygon's touching border

I have a layer containing multiple polygons, and I am trying to find a way to identify the directions of the adjacent polygons of a certain polygon. The directions would be based on the main polygon ...
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3 votes
0 answers
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Given a line find whether another line is along side, N,E,S,W or not

I have a shapefile representing roads (Black) and I need to know whether another line object (Red) is to the side of it. Including the orientation between them, to define whether the Red line lies to ...
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1 answer
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Is there a service or library that takes a route (with unlimited points) as input and returns text turn-by-turn instructions?

I am making an application that generates routes based on atypical heuristics so I would like a service much like Mapbox Directions API but I could: Disable the internal routing. (i.e. if I give a ...
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1 vote
1 answer
84 views

Construct points - orientation problem

I am having problems with the Editor function "construct points" in ArcGIS. If I select the line where I want to construct the points, the direction of the points is not correct. The orientation ...
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0 votes
1 answer
1k views

How to show line symbol (arrow) independently of line length in ArcGIS?

I am manually creating a polyline layer in ESRI geodatabase. Lines are of 2 vertices (start-end), variable length but all very short. I am using directional symbol with arrow at the end (or middle). ...
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1 vote
2 answers
1k views

What is the difference between "due North", "N0degreesW" and "N0degreesE"?

Is there a difference between "N0°W" and "N0°E"? These terms have been used in connection with Strike Lines. The final bearing computed was exactly 0. Will the direction East and West ...
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1 vote
0 answers
727 views

JSTS Buffered Polyline in route Service (google maps V3)

I do not know if someone has already lived the same thing as me, I work with JSTS API to create a polygon that surrounds the route of the google services but the problem is that when there are ...
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