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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2answers
22 views

How often do directions services update their OSM data?

Not sure if this is the right place to ask but I figured I would give it a shot. I'm working on an interactive map for a campus, I performed some edits to openstreetmaps and I can see the changes on ...
1
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0answers
12 views

I am trying to have markers in a KML to follow the direction of the view in Google Earth

I am trying to represent the flow direction of streams in a KML file to be used in Google Earth. As complex line symbols are not supported by the KML format, I have opted for a solution combining ...
2
votes
1answer
44 views

Distance to coast in specific direction

I have a point layer and want to know the distance to the coastline (line or polygon layer) from each point in a series of directions (0, 10, 20, 30 degrees, etc). I have found this python script (...
0
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0answers
20 views

Taking Lat and Long data collected with Geolocation API and using it with ArcGIS Network Analyst?

I am creating a routing map that will eventually be hosted on ArcGIS online.(I am using JavaScript) Currently, I have figured out how to find someone's current location using the Geolocation API and ...
2
votes
2answers
43 views

postgis How can I obtain directional buffer?

I have a geometry (polygon) which I want to extend with a buffer while testing on it in a where clause. The problem is that I would like the buffer to be only applied according to one or more ...
1
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1answer
20 views

Representing directional data from an attribute field

I have a table in ArcMap 10.2 containing strike measurements, in degrees, for ~100 sample sites. Each measurement has a UTM tied to it, and the map has already been populated with points, but I would ...
1
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1answer
85 views

Color gradients to show direction in polylines

I am referring to this very useful hack to change the color gradient of buffered polygons in order to show direction (with a gradient from red to green, for example) hack The only problem is that ...
2
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0answers
67 views

Why this pyqgis code cause crash dump in QGIS?

In ArcGIS there is gp.EucDirection to calculate Euclidean allocation, distance, and direction around a point, Is there equivalent function in pyqgis or gdal? I wrote a script with help of gene and ...
3
votes
1answer
52 views

Change direction of polylines from DEM data

I am trying to define the direction of my polylines (which represent gutters in a drainage system). Does anyone know if it is possible to define the direction based on elevation data extracted from a ...
3
votes
1answer
145 views

Getting the compass point given longitude, latitude and direction in degrees

I have this data gathered using a GPS device No. Time Longitude Latitude Speed(Km/h) Compass point Direction (deg) 1 10/20/15 1:34 40.11724 -3.21032 11 Northwest ...
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0answers
22 views

Using direction widget without a geocoder

Is there any way to force the direction widget to not use the geocoder? I am trying to use the widget but when I choose a location it is automatically geocoded and sometimes it changes the location.I ...
1
vote
1answer
116 views

How to show directions on the map?

I am using Mapbox, Leaflet. Via Mapbox Walking directions I create directions and save origin and destination markers coordinates; Then I want to show this created direction. So I do following: <...
2
votes
2answers
102 views

Query Features in Certain Direction

I have a polyline that I would like to query features that are on it's left, right, top, bottom. I am not looking for the features surrounding it but for features that are on a certain location from ...
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0answers
78 views

Calculate maneuver details using coordinates

I want to calculate the maneuver details (turn-left, turn-right, etc) from the coordinates array returned by google roads API (I'm using JavaScript). I know maneuver details only returned by google ...
1
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0answers
31 views

Vector file with photo direction arrow

I need to make a shp file with photo points incuding link to each points photo and at the same time should each point have an arrow pointing in the direction the photo is taken. As the photo ...
3
votes
1answer
176 views

Problem with flow lines in ArcMap

As a part of my PhD I have to map the rivers of Northern Peloponnese, Greece. I have downloaded two DEMs from Nasa Reverb, which I connected with "mosaic to new raster". I have started the usual ...
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0answers
340 views

How to stop drawing the polyline in Google maps when path reaches in some defined area near the destination?

I am trying to draw the polyline between the 2 points and my requirement is, the polyline should stop drawing when it reaches the specified area surrounding the destination. I mean I don't want the ...
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0answers
73 views

Make a line from a set of GPS points close to a specific GPS point with PostGIS

I have to develop a map-matching algorithm. At the moment I only match GPS points with the closest road segment. I'm looking for a way to compare the directions between a GPS point and a road to ...
2
votes
1answer
173 views

Draw line with lon, lat, distance and azimuth

I have table in PostGIS with lon, lat, distance and azimuth columns. I want to make Geoserver draw a line through first point with given length and direction. I can turn lon and lat to geometry in ...
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0answers
197 views

How to determine ring orientation from lat/long coordinate points?

We have some set of point coordinates in lat/long which contribute to a polygon. From this set how do we determine the polygon is clockwise or anticlockwise?
1
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1answer
81 views

Using Copy Traversed Features to count turns for a route result in Network Analyst

I have the output of the route layer. And I want to determine the number of right and left turns for each route. For that, I used the COPY TRAVERSED ROUTE FEATURES tool from Network Analyst. However, ...
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2answers
286 views

How to show street direction on map?

I am using sharpmap to render my OPEN STREET MAPS (osm) maps. i need to show the direction of one way streets on my map. How can i do that?! After googling i found SharpMap.Rendering.Symbolizer and ...
2
votes
0answers
116 views

Finding number of left and right turns for each shortest route

I have a network dataset for a city. I have, lets say, 200 trips that are made in that city. I constructed the shortest route for the every pair of the trips, and also the actual route travelled by ...
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1answer
311 views

Route planning needs double click

I am new to Stack Exchange so i hope i can prepare my question in an adequate way. I try to make a small route planning application. A start address should be entered and the destinations are fixed. ...
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1answer
305 views

How can I create individual directional point symbols in MapInfo?

I have a point tab file where one of the attributes is a 0-360 direction. I want to create an arrow symbol for each point with the arrow pointing in the direction listed for that point in the table. ...
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3answers
312 views

Collecting direction of taken photo in ArcGIS for Collector?

Just wanted to know if it is possible to collect the direction of taken photo in Collector ? Obviously, I would like to know which direction i'm facing (North, east south, west) when taking the photo. ...
2
votes
1answer
119 views

Euclidean direction

i'm trying to calculate the euclidean direction, in ArcGIS its very easy using the Euclidean Direction tool of Spatial Analyst but in QGIS i don't find how to do it. Any tips for this in free ...
2
votes
2answers
210 views

ArcGIS lines to polygons without holes

I have a dataset with contours. Depression contours are separate of the normal contours and need to be digitized counter-clockwise. Still, there are usually some faulty ones with wrong direction and ...
0
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0answers
18 views

symbolic display of line direction [duplicate]

I have a vector layer representing a road network that is encoded as a series of directional links. Thus, each is represented by a "from" and a "to" node whose coordinates are known. Is there any way ...
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0answers
783 views

Determining Flow Direction in ArcGIS for Desktop?

I have a problem with the Flow Direction tool ArcGIS 10.2.2. After running the tool on a digital elevation model in .tif format 16 bit unsigned integer. However the result is an image of 8 bit ...
1
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1answer
35 views

Keep direction information after intersect operation with fishnet

I will try my best to describe my question here: All the operations are done with ArcMap 10.1. I have a shapefile, which represent the stream segment network of a watershed produced from ArcHydro tool....
3
votes
3answers
416 views

Identifying the side of a point from the closest polyline in ArcMap 10.0

I have a set of polylines (a network of streams and rivers) with information on the left and right side of the streams on riparian structure. I also have locations (points) of either side of the lines....
2
votes
1answer
94 views

Direction of movement with points2paths in QGIS

I have a data set containing ship movements. I used the Points2paths plugin in QGIS to connect the points with the ship's names as factor and the time the signal was picked up as sorting value. Now I ...
1
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1answer
283 views

Flip multiple vectors

I have thousands of vectors (out of several million) which I need to flip, for directionally purposes (Network Analyst). The vectors in question are annotated that their directionality has been ...
3
votes
1answer
2k views

ArcMap - Display direction of points

I imported a few geotagged images and created a points shape showing their locations (or more accurately, the location of the camera) with the "Geotagged Photos to Points" tools. The attribute table ...
2
votes
1answer
379 views

Showing directional line symbol in ArcGIS for Desktop?

Is this possible in ArcGIS to have variable number of arrows on the line to show direction? This is an ArcGIS example, where I can have fixed (1,2,3,4,5...) number of arrows and it stays the same ...
2
votes
1answer
73 views

How to detect other objects are on which side of an object based on lat long

I am working on a system that detects the lat/long of vehicles. I want to track other vehicle's position: left, top-left, right, top-right, bottom-right, bottom-left etc based on lat/long. I have ...
3
votes
1answer
89 views

How to display bidirectional flows?

I'm working on a map showing oil shipping. Basically, I have a a series of nodes/line segments that make up the shipping network. I've joined the sums of oil that traveled along each node, so can ...
0
votes
1answer
215 views

Determining direction of longest segment of polygon?

I have a shapefile with 9000 agriculture fields and what I like to do is to determine for each field (=each polygon) the direction of the longest segment. For instance, the selected polygon in the ...
0
votes
2answers
967 views

Using grayed out distance/direction tool in ArcGIS for Desktop?

I have a set of five points (all with specific latitudes and longitudes) and I want to create a set of points which will be about 80 kms from the first set. I understand that I can use the distance-...
1
vote
1answer
298 views

Calculating field length in certain directions (raster)

Currently I'm working on winderosion. For my purpose I like to calculate the length of agricultural fields in certain wind direction. I would like to do it for raster. To be more precise: I have ...
0
votes
1answer
112 views

How to compute and fill One-way field in a street shapefile according spacial position

I think it is something complicate, but I hope someone could bring up any idea about. I'm using ArcGIS10, and I have a "One-way roads" shapefile with a One-way field with Y/N. But I need to create a ...
1
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2answers
240 views

How to convert Direction Of Travel OSM vectors from a “system” to another?

I have a painful doubt according Direction of Travel (DOT) vectors in OSM data. I'm using ArcGIS10, and a OSM data shapefile. I have a OSM road layer, that has many "Both ways" vectors and many "One ...
0
votes
1answer
319 views

Does OSM data contain the direction of travel?

I was looking for Direction of Travel (DOT) information inside OpenStreetMap shapefiles, but only I've just found "ONEWAY = 1 or 0", but nothing about its direction. If I work on an OSM editor, I can ...
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0answers
36 views

Changing tracks to vectors in a grid

This is a version of a question that I posted on the GRASS list, but I didn't get any suggestions there. I would like to overlay a grid (cell size about 500 m x 500m) over an animal track created from ...
1
vote
1answer
89 views

How can I calculate the nearest distance to a landscape element taking the direction into account (i.e. slope direction, prevailing winds)?

I am trying to build a layer of distance to relevant landscape elements in a watershed. To be relevant, a landscape element must be downstream with respect to the runoff direction.  Clearly, I want ...
3
votes
2answers
125 views

How to deal with Roundabouts in PgRouting

Can anybody guide me to to deal with roundabouts in pgrouting?? I have some roundabouts in my road network and when i try to make route from one point to another, it gives me wrong direction where it ...
1
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0answers
163 views

How to deal with direction in pgr_ksp (K shortest path)?

I am working on a android app for navigation with PostGIS and pgrouting. I have implemented pgr_dijkstra and its working fine. I am not considering direction in routing at this point and just want ...
1
vote
1answer
146 views

Distance-direction computation of lines with exactly/more than two nodes?

A distance and direction tutorial provided as an Answer at How to add Direction and Distance to attribute table? uses: xat (0 ), xat (-1 ) and yat (0 ), yat (-1) for start and end points of lines; ...
2
votes
1answer
361 views

Knowing acceleration, gyro and compass data how to calculate north direction [closed]

I have a small video camera with an attached sensor. I can get from the sensor his acceleration, gyro and compass data. Knowing this data I need to rotate the camera so that it will look strictly ...