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17

There are a variety of ways to navigate across oceans without the aid of maps and in particular the Mercator Projection. It is worth noting that before the invention of the chronometer (calculation of longitude) in 1764 there wasn't a reliable way of measuring longitude when out-of-sight of land. Most of the history I have read includes the Mediterranean ...


8

Google Maps just announced that they are now "mapping the indoors". From Wired.com: "Google Maps 6.0 for Android launched Tuesday with a bold initiative: indoor mapping. Partnering at launch with a selection of businesses and public service structures, the new mobile Maps version allows users to see the entire layout of a mapped building, switch ...


6

I think your best bet is going to be downloading GIS data for populated places and coastlines (Natural Earth is an oft-recommended source) and performing a proximity analysis using GIS software to exclude all places except those matching some criteria, e.g. within 10 miles of a coastline. Bear in mind the world is a big place, and the coastlines are very ...


6

I think that the type of software you are looking for is called a chart plotter software. There are several solutions used in navigation, where using a laptop is more and more common. I will not list here the solutions using dedicated hardware (AIS/navigation systems for example). Amongst paying options you have the "best seller" called MaxSea ...


6

Simple answer? They didn't really. Their routes are mostly coast-hopping. When they left the known coasts (i.e. crossing non-contiguous continents), they really hadn't a clue where they were. Latitude was OK with a star chart, but longitude was impossible until the chronometer was invented. Dead reckoning runs out of accuracy pretty quickly, and fails ...


5

Toolbars are located outside your screen area. You can use Python console to move them on screen. Here is example of moving Navigation Toolbar: qgis.utils.iface.mapNavToolToolBar().move(10,10) Names of other toolbars can be found by this link.


5

I currently work for a company that builds and maintains a navigable map product for several car companies. I cannot tell you too many specifics (due to NDA), but I can give you a basic overview. a) the GIS software that is powering automobile navigation systems. Are there any published specs, or are they completely proprietary implementations? ...


5

Interesting Project Having a Raspberry Pi myself, I have been amazed on the variety of solutions that can be done with a £25 ($35) computer. Update: This can be done and here is some proof: http://www.flypig.co.uk/?page=list&list_id=363&list=blog there is a video of this with the wireless keyboard ...


5

Polynesian navigation The Polynesians observed and learned a star catalog of declination and right ascension--This allowed them to ( a ) identify and name a navigation course, ( b ) transmit it orally to another navigator, ( c ) follow such a course. My understanding is that they learned "chains"--a chain is a sequence of stars that rise at approximately ...


4

Looks like the British Columbia Institute Of Technology (BCIT) GIS Department has done some research on this topic. http://giswww1.bcit.ca/georanger/index.htm


4

GPS receivers do not transmit any information they are built for receiving information. The encompassing device then uses said information depending on what the device was built for. You would be hard pressed to find a 'regular device' on the market which transmits data back to 'the satellites'. 'Talking' to 'the satellites' is not a necessary part of GPS ...


4

Do you need to remove the big one (blue one?) or the small one behind it? if the big one is the issue, try commenting: map.addControl(new OpenLayers.Control.PanZoomBar()); and you should get only one control like here: var map, layer; function init(){ map = new OpenLayers.Map( 'map'); layer = new OpenLayers.Layer.OSM( ...


3

You should initialize the map with no controls. You can do this passing an empty array to the controls like this: map = new OpenLayers.Map('map', {zoomDuration: 1,projection: 'EPSG:3857' controls: []}); You should then add only those controls that you require, like this: map.addControl(new OpenLayers.Control.PanZoomBar()); map.addControl(new ...


3

Open Trip Planner (Developer Section) OTP Deployer — The easiest way to get started with OTP is by using OTP Deployer, an web-based utility provided by OpenPlans Transportation. Deployer allows users to simply provide their transit data in the standard GTFS formay, and the rest of the process — from gathering street network data to building the ...


3

Bluetooth access points and a bluetooth-enabled phone would be one way (using Received Signal Strength Indicator): In-building location using Bluetooth Abstract—This paper presents a new system for indoor loca- tion of a mobile device based on bluetooth technology. Bluetooth access points of a network are used for the location system and to ...


3

I am currently conducting research that attempts to implement Gaussian Processes for Signal Strength-Based Location Estimation in a distributed grid environment using parallelized algorithms of GPs that will be consumed on an Android application. While I do not have a working implementation yet, I will certainly keep those interested updated. And you are of ...


3

Bing Maps use your cell triangulation rather than GPS when using the Mall Maps App http://www.bing.com/community/site_blogs/b/maps/archive/2010/12/07/bing-s-new-mall-maps-get-in-get-out-and-the-avoid-the-crowds.aspx Related (GISse) Why don't they use cell towers like GPS satellites?


3

Basically it means the differences between the two datums are not significant enough to be a difference in Nautical Navigation. Distance and Direction are so close as to be almost identical as far as Nautical Navigation is concerened


2

Someone is doing a presentation in Seattle at the AAG annual conference next month Maps and Society for the 21st Century AAG Annual Meeting in Seattle Thursday, 4/14/2011 at 16:40 PM. Author(s): Chungweon Oh, Prof.* - Namseoul Univ. "This Study explores Integration Strategy between GIS and BIM in Indoor Geographic information for effective management of ...


2

You can install QGIS 1.8.0, and the Openlayers plugin which serves you with an Openstreetmap background. You can import your data as text delimited layer, or GPX points layer, and print them on top of the Openstreetmap background. If your data is in lat/long degrees, the Coordinate system for your layer should be EPSG:4326 WGS 84. The project CRS has to be ...


2

I believe the software you are looking for is called "BP Distance Tables". It is a very easy to use program that does not require you to enter all the waypoints. You simply enter the starting and ending ports and in some cases you select the preferred route. The program does the rest. It is used by many ships to roughly plan their route. It gives them ...


2

At a first glance, the results make sense to me. If you want to check, you could use this link to convert the coordinates of your three stations and the coordinate of your point into ECEF XYZ coordinates. Then it is quite straightforward to verify that the solution is correct: compute the distance from each station to your point (you did not provide the ...


2

One of the best sources for open-source vector and raster map data is Natural Earth. There is a variety of data available at large, medium and small scale. You would likely need the Ports dataset available from 1:10m Cultural Vectors and the Rivers, Lake Centerlines available from 1:50m Physical Vectors.


1

If you're inclined to set up your own server for the area you're interested in routing within, you can check out the open-source OpenTripPlanner (OTP) project for multimodal trip planning. OTP uses OpenStreetMap data for car/bike/pedestrian routing, and General Transit Feed Specification (GTFS) data for transit data. We've developed an open-source ...


1

we can use the inbuilt method loc.getSpeed() method inside the onLocationChanged(Location loc) method of LocationListener. below is the code block: private class MyLocationListener implements LocationListener { public MyLocationListener() { super(); } public void onLocationChanged(Location loc) { if (loc == null) ...


1

Take a good look at these: Determination of a Position in Three Dimensions using Trilateration and Approximate Distances Trilateration: The Mathematics Behind a Local Positioning System A Distributed Linear Least Squares Method for Precise Localization with Low Complexity in Wireless Sensor Networks Ad hoc and Sensor Networks: Localization & ...


1

We had similar requirements when looking for a Maps API for our OpenTripPlanner for Android open-source project, and we decided to go with Android Maps API v2. Android Maps API v2 provides 3D camera control and 3D building renderings out-of-the-box, so you can easily create views like this: Android Maps API v2 was feature/performance-wise far beyond ...


1

There is (currently) no way for in-car navigation devices to make use of OSM map packages. The problem is that they are very closed embedded systems and there is no documentation about the navi file formats or how the operating system can be supplied with alternative software. As this situation is very sad, I highly recommend to start an petition on your ...


1

If by "Google navigation API" you're referring to either the on-device Android Location API or Google Play Services location services, the answer is no, there is no way to get the road (or position on the road) that is closest to a given location (including the device's real-time location).


1

I can not be certain that this issue is not a network issue, but you may want to check your network traffic and see if the returned tiles are valid or not(blank). If the tiles are valid on the network side of the house, your next debug path should be with the CSS properties listed below, found in openlayers. Inside theme/default/sytle.css .olLayerGrid ...



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