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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24 views

Is it possible to find the water flow direction in distribution pipes of a city with GIS?

I am trying to figure out how to find the direction that water flows based on the location of the water treatment plant, storage tanks around the city, and the size of the pipes. I want to see which ...
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19 views

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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27 views

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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1answer
154 views

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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1answer
223 views

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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1answer
27 views

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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1answer
41 views

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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2answers
96 views

What does QGIS arrow direction mean?

Is the base from the first point of the vertex to the last one?
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0answers
23 views

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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25 views

QGIS: Life GPS and auto rotate canvas with two antennas and receivers?

I am using QGIS and life RTK-GNSS on agricultural machines to find the borders of my fields. In some situations I would have benefits if I could see the position of an antenna in front of my machine ...
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25 views

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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1answer
114 views

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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1answer
289 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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20 views

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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1answer
60 views

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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20 views

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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74 views

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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1answer
25 views

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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1answer
108 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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1answer
231 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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1answer
173 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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29 views

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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1answer
95 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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2answers
321 views

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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1answer
28 views

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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1answer
243 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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1answer
106 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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1answer
426 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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1answer
780 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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1answer
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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1answer
352 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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1answer
643 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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29 views

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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1answer
347 views

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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2answers
60 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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4answers
8k 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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96 views

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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1answer
573 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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1answer
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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0answers
730 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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0answers
153 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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0answers
72 views

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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1answer
260 views

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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1answer
77 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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1answer
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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2answers
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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0answers
691 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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1answer
287 views

Creating direction raster in QGIS?

I need to create a raster with values showing directions relative to a single point. Each cell will have the azimuth to the origin point. Basic trigonometry could calculate this using the differences ...
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0answers
33 views

How can I create polygons that are on the edge of point data and angle the polygons based on numerical angle data generated from flow direction?

ArcGIS 3D Analyst 10.5.0. I have a set of well locations and I would like to define the groundwater capture zone based on the groundwater velocity and the direction of flow. I calculated flow ...
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0answers
11k views

Getting directions north/south/east/west with Google Maps API? [closed]

for example I have 5 markers and I want to get the direction (E,W,NE etc) for each one of them according to the main one(red in the center). Here is a pic. Is there a way to do this with google.maps....