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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14 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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22 views

Check direction of linestring against corresponding polygon

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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18 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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20 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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58 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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79 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
99 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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27 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
59 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
128 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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79 views

Python error on QGIS

We are doing the slope analysis for one of our clients and can find the following error every time we do the analysis. We have not faced this situation in the past. The QGIS version which are using is ...
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1answer
23 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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74 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
65 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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235 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
318 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
722 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
216 views

Calculate polygon main dircetion and create line from it - POSTGIS

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
388 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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27 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
209 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
55 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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5k views

Changing (flipping) line direction in QGIS?

I have river network in QGIS. I draw opposite direction one of the rivers. Now I want to change direction of that river. How can I do that in QGIS 3? (As I know it is flip in ArcGIS)
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89 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
391 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
996 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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444 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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120 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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71 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
113 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
67 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
951 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
556 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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570 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
178 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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32 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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10k 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....
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371 views

Walking route that covers the largest area in shortest distance

I regularly need to walk across field searching for bird nests. The field are often squares or polygons and the bird nests could be anywhere on the ground in the field. To stand the best chance of ...
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2answers
508 views

Creating Direction data in QGIS between two layers?

Can I do it in Qgis, that there are two layers, a target layer and an input layer, and I ascertain with an algorithm so that the closest points on the input layer are on the target layer in what ...
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1answer
600 views

Which projected coordinate system for whole China?

I want to project data of China. I'm not concerned with trying to preserve areal or directional relationships but preserving distances would be nice. Does such a coordinate system exist?
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310 views

Generating wind direction raster from wind's components?

I have a point shapefile, with each point representing the location of a weather station and storing values for wind SPEED and DIRECTION (in degrees). My goal is to create a continous surface (...
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2answers
1k views

Slope, in which direction?

I have a dilemma? I work with a slope terrain. Slope field is done by a percentage of 10%. My question is, in which direction is oriented this pixel, or any pixels? It is important to know to what ...
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2answers
1k views

Determining direction of polygons using QGIS?

Is it possible to get the direction of the longest side of a rectangle in QGIS? I know how to get the direction of a line layer. But I need to know the direction of a polygon. One could start at ...
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1answer
1k views

Determining the direction of polygons?

Is there a way in QGIS to figure out the direction of a polygon, if there are no values given? What I need to know is if a polygon is directed to the south. I want to know the direction of a house ...
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1answer
90 views

Flow direction without DEM / raster

I am trying to figure out flow direction for a stream network and I do not have a high resolution DEM data for the same. I only have information about the stream orders and the network itself. Is ...
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1answer
1k views

Reverse polygon direction in QGIS? [closed]

The following Python code is very helpful to reverse the direction of lines in QGIS: layer = qgis.utils.iface.mapCanvas().currentLayer() for feature in layer.selectedFeatures(): geom = feature....
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1answer
487 views

Display map from python script?

I did a Network Analysis with ArcMap, executed by a python-script (I am building an ArcGIS-Tool). In the very end, I want my directions-output to be shown as a displayed map, so the user can navigate ...
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1answer
8k views

Finding compass direction between two distant GPS points?

I have a Latitude & Longitude for two locations (me in the West, him across the country), and a web-calculated GPS point for each. I'm trying to figure out which direction -- per my compass -- to ...
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699 views

Right-hand-rule in QGIS

It seems that there isn't a plugin to perform the right-hand-rule on a layer or selected features. Can this be done by using some Python code? Is there a function that works in the same way as ...
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1answer
128 views

Relative position of nodes

I am studying bird movements and have tracked their locations, ie from flower 1 to flower 2 to flower 3 etc. Each point is mapped out. I am trying to work out the relative direction for each movement ...