Questions tagged [direction]

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

Filter by
Sorted by
Tagged with
0
votes
0answers
13 views

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 ...
0
votes
0answers
22 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 ...
0
votes
0answers
13 views

Regarding Animation of Vector data in Google Earth Engine

I want to animate the vector file of Wind Direction in Google Earth Engine. https://code.earthengine.google.com/9bd384d4041e4426e677281704dcd407
5
votes
1answer
88 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 ...
0
votes
1answer
41 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 ...
0
votes
0answers
15 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 ...
0
votes
1answer
40 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 ...
0
votes
0answers
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?
-1
votes
1answer
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 ...
1
vote
1answer
73 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?
2
votes
1answer
118 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 ...
2
votes
1answer
110 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 ...
1
vote
0answers
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 ...
2
votes
1answer
65 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 ...
0
votes
2answers
177 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). ...
0
votes
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 ...
2
votes
1answer
111 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 ...
1
vote
1answer
77 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 ...
0
votes
1answer
293 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 ...
1
vote
1answer
492 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 ...
3
votes
1answer
919 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 ...
4
votes
1answer
259 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.
1
vote
1answer
448 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.
1
vote
0answers
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.
3
votes
1answer
244 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 ...
1
vote
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) ...
6
votes
4answers
6k 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)
1
vote
0answers
92 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 ...
1
vote
1answer
456 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 ...
3
votes
1answer
1k 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 ...
2
votes
0answers
515 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 ...
1
vote
0answers
133 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 ...
3
votes
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 ...
0
votes
1answer
137 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 ...
1
vote
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 ...
0
votes
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). ...
1
vote
2answers
685 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 ...
1
vote
0answers
596 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 ...
2
votes
1answer
204 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 ...
1
vote
0answers
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 ...
1
vote
0answers
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....
7
votes
2answers
407 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 ...
6
votes
2answers
579 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 ...
2
votes
1answer
666 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?
0
votes
0answers
322 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 (...
7
votes
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 ...
6
votes
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 ...
6
votes
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 ...
0
votes
1answer
93 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 ...
2
votes
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....