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Questions tagged [navigation]

Application of location and direction calculation to GIS. Including location and travel of vehicles, vessels, people and other craft.

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Extract polygons from TIFF file of depth model

I am trying to create a shapefile of polygons from a TIFF file using QGIS. The TIFF file represents a depth model of Denmark. I want to create the polygons based on a particular depth (-2 meters), ...
Lukas Eliassen's user avatar
0 votes
1 answer
953 views

Locking Scale when Panning using ArcGIS Pro

Is it possible to lock the scale of a map in ArcGIS Pro 2.9? I'm manually editing a bunch of feature classes, so what I usually do is open the table, edit my field, then double click the next row ...
sushi's user avatar
  • 327
0 votes
1 answer
125 views

Minimum number of satellites per constellation in Multi-constellation Navigation

Relating to my previous question, I'm trying to understand how the LS method work for multi-constellation GNSS trilateration/multilateration. I understand for 2 constellations, trilateration require ...
Shawn Lim's user avatar
  • 131
1 vote
0 answers
73 views

Storing Line(2D) data in Navigation Data Standard format as geometry using SpatiaLite

Is it possible to store Line(2D) data in Navigation Data Standard format(with coordinate bit shift) as geometry into SQLite and also make use of SpatiaLite functions for querying? I have to use ...
Riya Francis's user avatar
0 votes
0 answers
25 views

Place marker on map - GeoTools 25-SNAPSHOT - Java 11 [duplicate]

I am using GeoTools 25-SNAPSHOT in my application. I have displayed a map in my application (raster). Now I want to place a marker (image or simple colored dot) on a map at a specific latitude, ...
code_poetry's user avatar
-1 votes
1 answer
483 views

US 000 file type maps [closed]

I'm looking for a free enc so I downloaded this one https://charts.noaa.gov/ENCs/Agreement.shtml?US2EC02M. After unpacking I have a file US2EC02M.000 and CATALOG.031 What should I do with those? I ...
Simao12's user avatar
1 vote
0 answers
214 views

Determine if a great circle is on the left or right from a point defined by latitude, longitude and bearing

Given A point coordinate on the map specified by latitude and longitude. Shown as "C" on pictures below. Direction where this point is moving, specified by bearing in degrees (0-359), where ...
RustamG's user avatar
  • 119
1 vote
0 answers
202 views

Convert Google Maps KML to preferred format on a Hyundai Ioniq EV's BlueLink Map

I want to upload data for all Eduroam WiFi locations in Canada to my car navigation system which has an "Import Address Book from USB device" option. I downloaded the current locations I ...
mLstudent33's user avatar
1 vote
1 answer
4k views

What are these terms in Marine Navigation ETA, DTG and TTG?

Consider a scenario where a ship has to navigate and reach a specific destination. I have a route plan comprising of multiple route way-points through which my ship has to go through to reach its ...
Fuzail's user avatar
  • 133
5 votes
1 answer
719 views

How do you create a line network with GeoJSON navigation point data

I have a GeoJSON point file for use in navigation. I need to create a line network connecting the points to their corresponding 'neighbors' in the data. I have looked for any sort of plug in or ...
brink's user avatar
  • 820
1 vote
0 answers
585 views

Calculating direction for points (lon/lat) in a perfect circle (shape) north of equator?

I have perfect circles in lon/lat on a OpenLayers map. Near the Equator I locate each point on the circle using bearing-calculation for each point from circle-center. Meaning there are 360 bearings ...
otk's user avatar
  • 215
3 votes
2 answers
1k views

Is the GPS signal being scrambled near military bases

We are navigating our survey aircraft using standard GPS receiver. Sometimes we fly near the vicinity of US Ramstein military base in Germany and it seems we are losing lock (no solution) in that area ...
U2ros's user avatar
  • 5,117
2 votes
1 answer
2k views

Loading and displaying NDS (Navigation Data Standard // SQLlite)?

On QGIS 3.4 (Windows), I would like to load and display NDS (Navigation Data Standard) data (attributes and geometry). I succeed in loading NDS data sample from openlanemodel. Via the QGIS DB manager,...
user35117's user avatar
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1 vote
0 answers
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Determine left/right based on headings of in & out legs

I'm analyzing roads layer to create navigation layer. Each vector Linestring segment has direction of traffic. Turn defined as where 2 directional segments meet. However, I find it challenging to ...
michael's user avatar
  • 1,809
0 votes
1 answer
20 views

Simulating navigation bar in attribute table of ArcMap using ArcPy? [closed]

I want to focus on specific record in the attribute table when it is open. I have made several experiments with SearchCursor but that just selects the record, even focusing on the feature on the map ...
Panos's user avatar
  • 173
0 votes
1 answer
53 views

Seeking GIS Navigation App for High Accuracy Data? [closed]

Are there any mobile GIS applications that I can use to navigate to high accuracy data on android? I would like to load layers - a .shp or .kml and use the map to navigate to points. It needs to be ...
gisgirl's user avatar
  • 113
2 votes
0 answers
152 views

QGIS 3.4.3 touch zoom and pan

QGIS 3.4.3 touch zoom and pan missing from Map Navigation Toolbar is this a permanent loss or will there be a fix?
Richard May's user avatar
0 votes
0 answers
219 views

Autonomous GPS navigation issues

I am trying to achieve autonomous GPS navigation on my RC car. I am using a very high quality GNSS/INS sensor (Advanced Navigation Spatial), from which I am getting lat, long and heading values. The ...
Shibalicious's user avatar
2 votes
0 answers
456 views

Flat Earth approximation: forward and reverse formulas

For very small distances (< 100 m) I need to go back and forth between "polar coordinates" (i.e. bearing and distance) and "equirectangular projection". I'm not sure whether I understand them ...
Mark's user avatar
  • 121
2 votes
0 answers
263 views

Can navigation apps use compass and orientation sensors to improve reactivity and accuracy? [closed]

I've had the impression that Google Maps provides more accurate walking navigation on Android devices which include a compass in addition to a 3-axis accelerometer and GPS receiver. Perhaps this is ...
Dan Lenski's user avatar
0 votes
1 answer
32 views

How to name a point where we are "back to the initial route"?

I have an initial route, that I leave (for instance in order to refuel). How to name the point where I'm back on the initial route?
Greg82's user avatar
  • 123
0 votes
1 answer
916 views

Converting GPS track to turn by turn directions

Working for a client on a tracking package for delivery vehicles, I've been given an interesting requirement. Over the past several months, we've been collecting telemetry from the vehicles, ...
alzee's user avatar
  • 101
1 vote
1 answer
45 views

Seeking Mobile App to insert customized roads for navigation?

I want to know if there is a mobile app (for cellphone) where I can insert my line features (roads) and polygons features (fields), all in vector form (.shp) and somehow navigate with that information....
gert's user avatar
  • 61
1 vote
0 answers
351 views

How to calculate if a turn is required from a set of coordinates?

I have some polyline data that represents a navigation route generated using Dijkstra's algorithm. Along this route I would like to calculate anytime a turn is required. Ideally, this would be some ...
guest23812094938's user avatar
1 vote
4 answers
1k views

Points shapefile from QGIS to Android?

I have a points shapefile in QGIS with 40 groups of 20 points each (total of 800 points). For each point I have stored many information. I need to check this information and add more moving on the ...
Ale's user avatar
  • 1,313
3 votes
1 answer
889 views

How to create turn-by-turn directions from a generic polyline route? [closed]

I have some polyline data that represents a navigation route generated using Dijkstra's algorithm. Along this route I would like to calculate anytime a turn is required. Ideally, this would be some ...
guest23812094938's user avatar
0 votes
0 answers
64 views

Why many in-car navigation systems choose to go through the city center?

Most of the in-car navigation systems I've been using prefer to select an itinerary that goes through the city center, rather than getting around. And this is the case while the "Fastest" (not "...
Déjà vu's user avatar
  • 109
0 votes
1 answer
374 views

Why is the CORS coverage density in the US is so high?

According to the data I found online, it appears that the density of CORS (Continuously Operating Reference Stations) in the US is significantly higher compared to other countries. Why? (NOAA ...
Sparkler's user avatar
  • 213
4 votes
1 answer
3k views

What are all the straight lines on old nautical charts?

I was checking out this old VOC chart, and I couldn't help but notice a pattern that I've seen on most nautical charts of the time: lines that to me seem to be just every possible line one can draw. ...
Jason P. Barmparesos's user avatar
0 votes
1 answer
122 views

Simple Linux desktop navigation system for tracking a drone

Trying to build my own ground control station (GCS) for different drones I have. One is a boat and the other a plane. I have looked at the GCS's available and they are great, but I want to do ...
hahobson's user avatar
1 vote
1 answer
61 views

Road Network with 4th & 5th road level (small agriculture roads & footpaths)

I have a need to use 4th & 5th level roads (small agriculture roads & footpaths) for Germany and the only provider I could find is the Logiball. Is anybody aware of another provider?
Stratos Tso's user avatar
2 votes
0 answers
80 views

Inland shipping GPS data, flag upstream/downstream movement [closed]

In the context of greening the inland shipping industry I am analyzing GPS data on moving ships. For these ships I would like to separate the data for upstream/downstream movement (up/down river). ...
balletpiraat's user avatar
1 vote
2 answers
1k views

Interactive shapefile based map

I'm developing an interactive web-based navigation application which user can search locations and navigate from point A to point B by an online map. The routing algorithm (find shortest trajectory ...
bijan's user avatar
  • 11
0 votes
1 answer
860 views

Reading GPS data from iphone and save data into computer?

I would like to use my iphone for navigation. I want to read GPS data (latitude and longitude) from iphone and save the data into my computer to use it for navigation. I am using Matlab in my ...
Learning's user avatar
1 vote
1 answer
258 views

Routing Engine / data for hiking trails (Austria)

I currently use OSRM for the routing in my apps. This works well for car/truck routing. However, I have an upcoming project that requires routing on hiking trails as well. Are there any available ...
Chris's user avatar
  • 291
1 vote
1 answer
3k views

How can I transfer shape or database files to Terrasync without Pathfinder office?

I have point data in ArcGIS that I need to get onto my Trimble GeoXT (with TerraSync Standard). I don't have Pathfinder Office. Is there a way to transfer the data over so I navigate to the points?
Laen's user avatar
  • 11
1 vote
0 answers
85 views

walk me through tdoa [closed]

I'm working on a TDOA application. This is just something in my free time to see if my hardware can accurately do it and it sounded like a cool challenge. Regardless if it looks possible or not, I'm ...
John Sly's user avatar
  • 131
1 vote
0 answers
16k views

Key difference between NAVIC Indian Regional Navigation Satellite System (IRNSS) and American Global Positioning System (GPS)? [closed]

What's the key difference between NAVIC The Indian Regional Navigation Satellite System (IRNSS) and American GPS system? Radio Frequency Accuracy guaranteed Modulation Area Covered Engineering ...
visabhishek's user avatar
2 votes
0 answers
506 views

How can I position gps point on svg (or any other special type if exist) scheme of building?

I have an indoor map of a building in svg and this is an only scheme of a building, there is no google maps or any other maps. But I need positioning (navigation) by gps coordinates in this scheme. ...
pronevich's user avatar
  • 121
3 votes
0 answers
13k views

Can I use google maps navigation within my app

I am considering building an app which includes google maps. The app functions by tracking the GPS location of the vehicle and showing it to the respective user on the Android app with some additional ...
Georgio17's user avatar
2 votes
1 answer
1k views

Navigating to Lat/Long in QGIS with a relative coordinate system

It seems really fundamental, but how do I pan the map center to a decimal lat/long in QGIS? I would type in the lat/long at the bottom, but I use WGS 84/Pseudo Mercator to use the streetmap from ...
steamrunner's user avatar
1 vote
0 answers
252 views

Use preferred route from OSRM server

I added to an original osm.map my own routes (nodes, ways, relations). I need a way to retrieve from my OSRM server these routes (for navigation). I try to change the speed of my routes in order to ...
Shalom Ohayon's user avatar
1 vote
1 answer
335 views

Navigating a road network and avoiding u-turns

I've implemented a node-based A* search of a road network graph. I would like to penalize u-turns a places where bi-directional streets join together again, which I identify successfully via a match ...
Synesso's user avatar
  • 235
1 vote
1 answer
46 views

Standardized format for contributing street closure data to navigation apps

I am wanting to put together an application that will digest georeferenced road closure data. I am wondering if any such format currently exists for notifying google maps or other navigation ...
AvidDabbler's user avatar
1 vote
0 answers
424 views

Flat Map that can go thru North Pole

Is there any map SDK or tool that can show the navigation that passes through the north pole in a flat way? Basically If I use a Mercator projection map it is only flat and cannot show the north part ...
SleepNot's user avatar
  • 217
3 votes
1 answer
71 views

What does it mean for two datums to be navigationally equivalent?

I read from NOAA that NAD83 and WGS84 are "navigationally equivalent" NOAA uses the North American Datum of 1983 (NAD 83) for all of its charts. This datum is navigationally equivalent to the ...
tinlyx's user avatar
  • 11.1k
11 votes
3 answers
3k views

How did sailors navigate before the Mercator projection (1536)? [closed]

The Mercator projection (1536) must be great for nautical navigation. It allows one to find a bearing and keeping this constant one should reach the target (if not in the shortest line). But how did ...
Andy's user avatar
  • 373
3 votes
1 answer
1k views

Good GPS navigation app for iPhone with downloadable OFFLINE maps?

I am looking for a good GPS navigation app for my iPhone that will work away from wifi and cell coverage (GPS only) and thus allow me to download offline maps. Paid app is OK. Must Have features: ...
Jakub Sisak GeoGraphics's user avatar
1 vote
3 answers
1k views

World map with clear difference between land, sea and inland waterways

I'm looking for a free high resolution map that clearly indicates the land and sea in the world. I need it to calculate distances over sea between ports. Additionally it should also include inland ...
Jan-Pieter's user avatar
2 votes
2 answers
182 views

Geocoding adresses under privacy concerns

I have a database of home addresses and service locations. People drive to the service locations. I'd like to create a map with transparent colored circles indicating the average drive times people ...
Mike's user avatar
  • 21