The identification of the real-world geographic location of an object

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3
votes
1answer
162 views

Worldwide places reachable by sea/ocean

I'm looking for a list of all populated places(not just big cities/ports) on the world that reside on sea/ocean. The list should contain the place name, latitude and longitude. Does something like ...
1
vote
1answer
42 views

How to convert distance into latitude + longitude [duplicate]

I have start point (latitude) I know direction, lets say strictly north, and I want to calculate latitude which is 100 meters above the start point. The same for longitude. I believe there should be ...
3
votes
1answer
62 views

Mastering Geo Locators in ArcGIS 10.2

We just moved from 10.0 to 10.2 and woke up to the wonderful news that all our geolocators are broke and need to be recreated. Most were made in 9.3. This is fine, but the locator building process has ...
1
vote
1answer
75 views

What is the best database for an online Android location app?

I am working on Android app for locating food places in my city. Using Google Map v2 api. App shows user his current location, and the closest food spots around him. I want to store location ...
0
votes
0answers
26 views

computeDistance() does not work in Google Maps API

I am trying to learn Google Maps API. When I try the below code, execution stops at var km = computeDistance(position.coords, ourCoords);. I get to see the "before compute distance" alert but not ...
0
votes
2answers
86 views

Socket Server to receive GPS location data

I am working on a web application which receives data sent from trackers via TCP Packets containing location information. Up until this point we have been working with dummy data within the mysql ...
1
vote
0answers
32 views

Which geo-location available in Twitter data should I use?

I am extracting twitter location on my side.Few tweets has perfect location but in most cases additional details are available (i.e. Country,bounding_box,poly lines etc) So confused regarding ...
0
votes
2answers
184 views

ArcGIS 10.1 Geocoding problems - Creature Feature Class/Error processing the table

I am trying to geocode a list of addresses to location in a particular shapefile which has roads. I'm using ArcGIS 10.1, and trying to geocode using the address locator 10.0 north america geocode ...
0
votes
2answers
47 views

Tools to write bus map?

I noticed that few cities provide a bus map for smartphones. As a result, tourists usually resort to just taking the subway instead because it's easy to figure out, although riding a bus is a better ...
-1
votes
1answer
62 views

Extracting area with a range of lat long?

Is there any online tool to extract a certain area with a range of lat long? I'd like to overlay some locations on a map. To do so, I need a map whose range is specified so that I can determine the ...
1
vote
0answers
136 views

How to add Points to a jvectormap in Miller Projection [closed]

On jvectormap you can pull down a map of map of austria. I want to be able to plot points (using WGS84 coordinates) onto that map. The map has this information inside: "projection": {"type": ...
0
votes
3answers
190 views

How to use GTFS data to create a Transit Route?

I am brand new to the General Transit Feed Specification (GTFS) stack and subway calculations and I'm working on a project where I need to tell a user what the best route / line to take based on their ...
0
votes
1answer
293 views

offline map tiles in standalone desktop app

Which mapping API can be used (either in a C# desktop app or as a standalone mapping app) that accesses an offline tile collection and requires only a minimal amount of additional servers / other ...
0
votes
0answers
64 views

Arcgis custom spatialreference and geolocation problem

I have a tiled map service layer that has custom spatial reference. This is url of map. Spatial Reference: ...
0
votes
2answers
161 views

Spatial databases in location based search

I'm developing a location based application in which i was in the plan of dividing the globe into grids and when the client requests information, will create a table or similar data model which will ...
0
votes
1answer
59 views

How to get bbox from geolocate?

I am using geolocate to zoom to the users location. Afterwards I am trying to get the bbox of that area. However the geolocate function is for some reason always executed last, so I don't get any ...
0
votes
0answers
653 views

Is 45005000 a recognisable location?

Hello and sorry if this is not a relevant question to this SE. Please if it is not, mitigate it to where you see fit. I have recently purchased an item online and I have been provided by the seller ...
0
votes
0answers
28 views

Geo locate own view pic on google map [duplicate]

I need to use Google map( GMap API) on C#, and I need to import my own picture for some place I want (with high resolution), plus it has its information on map such as : width,high, size of pixel , ...
1
vote
4answers
235 views

Offline Python or C++ library for plotting locations on map?

I'd like to plot locations using longitude and latitude coordinates using Python or C++, is there a good library for such a task? I know that matplotlib is an option, I'm wondering if there are any ...
0
votes
2answers
68 views

Definite way to confirm a geocode as correct

So you tested few geocoding services for the same street address. You got results varying by 0.7 to 3 kilometers. How can you tell which geocoding service was more right, other than letting your user ...
1
vote
1answer
175 views

Android GPS: average location resolution time

What is the average location resolution time on a SmartPhone(Android) GPS? Assumptions : The user is under the open sky.
0
votes
0answers
100 views

GNSS / Geolocation API

(I am may be mashing many topics into a single question, please forgive my ignorance) HTML5 Geolocation API GPS location accuracy with the above API is based on the accuracy that the device reports, ...
0
votes
0answers
44 views

How to Create Location Types Using County or other “local” areas

I am a beginning econ grad student working for a professor who wants to begin creating maps using state and local data (which means I need to learn how so I can make them for him). I am primarily ...
0
votes
0answers
24 views

How to verify if a point feature has correct geographic attributes? [duplicate]

I am having a problem with a geodatabase where I want to verify if a geographical coordinate belongs to the correct locality. How can I do it with ArcGIS? I have been given a set of coordinates for ...
0
votes
1answer
109 views

converting grid references to long/lat

If I import from a POST DB a set of points that are referenced by grid reference, will the long/lat decimal also be added to the file? or will I have to convert the points to long/lat myself? In ...
0
votes
1answer
505 views

Download/create address locator styles for Europe?

Where can I find some address locator styles for European countries? or how can I create my own address locator that contains street, house number and city, and use their aliases? PS. I have the ...
1
vote
2answers
261 views

Geo IP database for Brazil?

I am looking for a database that offers good accuracy for obtaining region from an IP address? Or, if this question is too fuzzy: Which one is (possibly) the most accurate? Note: I only need a ...
12
votes
2answers
356 views

Propose a new location for Watch Tower using Viewshed Analysis

I want to suggest location for new watch tower in a forest area, but i am confused , on what criteria i can propose a best location. If i am taking DEM , slope and distance from existing tower , ...
8
votes
4answers
3k views

How does WiFiSLAM work?

Apple recently acquired WifiSlam. How does their technology work? Their website doesn't go into much detail. Allow your smartphone to pinpoint its location (and the location of your friends) ...
3
votes
1answer
518 views

How to calculate midpoint given north/south latitude and east/west longitude?

First, sorry if this questions sound very simple. I am very new to GIS. Given four values of north/south latitude, east/west longitude how to calculate the center point that is correct for all cases ...
2
votes
1answer
240 views

Why does Updating Location of ArcSDE Feature using ArcObjects .NET give Error HRESULT E_FAIL has been returned from call to COM component?

I have been able to connect to an Enterprise GeoDatabase, retrieve features from it and update attributes. However I am having problems accessing and then updating the shape property of a feature. ...
1
vote
1answer
640 views

add a feature in openlayers using lonlat from geolocation

I'm trying to add a feature in a openlayer's vector layer using the lonlat that came from the HTML5's geolocation API. Combining tutorials for the geolocation and this demo I created the following ...
5
votes
1answer
486 views

Where can I find High Quality Road Network Information

I am carrying out a research on how complex city road networks get and I need to get accurate map information. I started with openstreetmaps however I ran into a couple of issues: some of the dumps ...
8
votes
4answers
431 views

Geolocation database of beaches

Anyone know where or how to obtain a database of worldwide beaches? Required fields are: name latitude longitude coastline aspect (if possible) Alternatively, is there a way to query Google Maps ...
3
votes
2answers
85 views

Where can I find a map with the location of towns and cities in Southern Sudan?

For a project I have some name of towns and cities in the Southern part of Sudan, the region South Kordofan. Many of these towns I can't find on Google Maps, but I need to know their location. ...
2
votes
1answer
320 views

Openstreetmap - retrieve nearby big cities for a given location

I was wondering how I can retrieve places near a given location? For example, if I pass the osm API the location "Paris" is it possible to retrieve all the main biggest cities around Paris within a ...
16
votes
1answer
3k views

Trilateration algorithm for n amount of points

I need to find algorithm that can calculate centroid A (aka gravity center, geometric center, center of mass) from the figure where circles T1,T2,T3,T4,T5,..,Tn intersect AND length of line R from ...
8
votes
3answers
891 views

What GPS device do I need for vehicle tracking?

I am a programmer with no connection to Geographic information, except that I work on application which uses google maps. So here is my problem. I need some device, which I will be able to set in a ...
4
votes
0answers
196 views

Translate Orientation from Sensor data to Geo location

I am tracking a device that might loose GPS signal then and there. And when the GPS signal is too low, I should use the accelerometer and Gyroscope sensors data to guess which way they should have ...
2
votes
0answers
114 views

Geolocate stores inside a mall?

OpenStreetMap lists the malls in Albuquerque, but not the stores inside these malls. Using the in-mall map/directory, wouldn't it be easy to add stores inside the mall? Is anyone doing this? ...
10
votes
2answers
104 views

Where does one ask “Where is …?”?

On a fairly regular basis at my place of work we get inquiries of the form "where is Lake Potato?" or "where is Poppingstone Creek?" or... The questions come from co-workers, the general public and ...
1
vote
0answers
49 views

Best Source for Consumer Data for direct contact [closed]

Parcel data is fairly easy to consume within a map; it gives you name and address information. Are there any map based contact information providers? Does anyone provide a service that is consumable ...
8
votes
3answers
5k views

How to generate random locations nearby my location?

I am trying to create random locations nearby my location. What i want is to create random latitude/longitude pairs inside a 200 meters circle surrounding my location. This is the formula i came up ...
9
votes
1answer
508 views

How much sense does it make to average (lat,lon) samples in order to increase 2D accuracy of a GPS location?

Several GPS applications, like this one, or this one, acquire multiple (lat,lon) samples of a given location, assuming that the GPS unit is not moving, and then take an average of the samples in order ...
8
votes
1answer
94 views

How To Understand Geological Directions?

I was reading a "Guide to Some Minerals and Rocks in Indiana," which was published in the 1950s, and in it there were these bewildering directions: "Bluff along Mud Pine Creek 1.5 miles west of ...
4
votes
1answer
519 views

Probability of iOS/Android device location accuracy

I'm working with Android and iOS apps that report location. Both iOS and Android can derive location from a combination of cell tower triangulation, visible wifi access points, and assisted GPS. The ...
-1
votes
0answers
43 views

Determine the Closest road to a GPS point [duplicate]

Possible Duplicate: Calculate distance of point from an arc/polyline I have been trying to find the road to which a GPS point is closest to. I have a postGIS database which i loaded with ...
4
votes
4answers
2k views

Calculate distance of point from an arc/polyline

Using Postgres/PostGIS, I am trying to query the database for the closest arc to a particular GPS point. Each Arc is made up of two nodes that are GPS points on a map. Is there a way I could query ...
2
votes
2answers
628 views

Reading MODIS L1B into ENVI

I am working with MODIS Terra (and simultaneous ASTER) Level 1B swath data using ENVI and am having one of these "this should be easy" questions about the most direct way to get to geo-referenced ...
1
vote
1answer
143 views

I would like to show points moving on a map by date

I would like to create a map where i can see points moving. I have table of points for example with a date column, A 01/01/2012 B 02/01/2012 C 03/01/2012 D 04/01/2012 E 05/01/2012 F 06/01/2012 I ...