The direction tag has no wiki summary.
13
votes
2answers
2k views
How can I calculate the bearing between two points in PostGIS?
How can I find the bearing between two points in PostGIS?
Please specify in your answer whether or not the method producing a bearing on the spheroid, or a planar bearing.
10
votes
2answers
214 views
Which weather on my road? Looking for a spatial weather forecast web service
My friend Bob goes from A to B leaving tomorrow morning at 6:00. There are many direction services that indicates him short, fast and/or cheap routes. Bob does not like to drive under the rain and ...
6
votes
1answer
175 views
What determines “west” in Antarctica?
Hopefully this isn't so far afield as to get banned - apologies in advance to those who think it doesn't belong.
This article discusses a region of Antarctica which is described as "West Antarctica". ...
6
votes
1answer
337 views
How do I find least cost path over a DEM based on slope magnitude and direction?
What sort of algorithms can I use to find a least cost path through a DEM where it costs more to traverse a cell going downhill or uphill than it does to follow the contour of the land?
All the ...
3
votes
1answer
287 views
How to get the Flow or directional raster map using GRASS?
Aside from using r.fill.dir in GRASS, is this the script to produce the Flow or directional raster map? Is this the output for the script ...
3
votes
0answers
68 views
Advanced GMaps directions
I try to create an application for taxis.
The application will be GMap based.
On the map will be marked the region in which the taxi driver is working in.
The region will be a poligon designed by ...
3
votes
0answers
262 views
Is there an open source directions webclient for pgRouting like the directions API from Google?
I am looking for an open source webclient with (Google) directions functionality (like draggable lines to create extra waypoints) based on an pgrouting database (with an osm2pgrouting topology).
I ...
2
votes
2answers
250 views
how feasible is building my own map server? providing GeoCoding, Directions and Navigation
My need is a heavy use of routing. same as Google's Directions API. I'm looking for a viable alternative to abusing google and paying them too much.
how difficult is it to have my own server for that ...
2
votes
2answers
174 views
Working out parcel direction
I am looking at applying a direction indicator to land parcels and houses (in MasterMap).
effectively, I am looking at applying a direction indicator to the land and the buildings associated to the ...
1
vote
1answer
148 views
Small Idea to get best path between two points
Guys I don't know if its a good place to post ideas or to ask general questions. Still as the question is related with maps service, I am posting it here. If it's not the right place, please move me ...
1
vote
1answer
764 views
google maps V3 : in javascript api, render route obtained with web api
I have to obtain route directions with the Google maps v3 WEB (http request) api (computations are made server-side, based on this data, without client interaction, so no JS available). Then, the ...
1
vote
0answers
60 views
Arrow flow lines from a contour map
using QGIS (or even GRASS) is it possible to label a contour lines shape with arrows that indicate the flow direction?
Briefly: I have a point shape with elevation values. I make an interpolation map ...
1
vote
0answers
42 views
How to indicate a change in transport mode for directions in a multimodal dataset
When I solve a route and generate directions for my multimodal dataset, the end product is not very user friendly:
The pedestrian started walking along Main Street and then boarded a bus to travel ...
1
vote
0answers
113 views
Avoid backtracking while creating loop in Google Map API 3
I am trying to build a solution where i would create loop by google map. My first and only business rule is there should not be any repeated route. But with my demo ...
0
votes
0answers
24 views
Switching between different feature sets / Change orientation of Openlayers Map
Setup
Entities postgis table:
id | name | the_geom | campus_id
1 | bldg_1 | <b1_geom> | 1
2 | bldg_2 | <b2_geom> | 2
3 | bldg_3 | <b3_geom> | 1
4 | bldg_4 | ...
0
votes
0answers
103 views
Driving directions and multi-modal route planning service for a city with OpenStreetMap data
First off I'd like to mention that I've never come close to anything-GIS until a few weeks ago when I thought of this. So please expect some layman's questions. I'm looking to create driving ...
0
votes
0answers
69 views
How to add more points to Google Directions route?
I managed to add two points to Google Directions route - start and end point, but I'm interested to adding more end points like on this site: http://www.bikeroutetoaster.com/Course.aspx
When user ...
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