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

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0
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0answers
34 views

Retrieving all towns/cities/villages within 2km of river path?

I need to find all the cities/towns/villages that are within a 2km range along a river path. So the solution I have now is to create a google custom map, and draw a polygon which will be 2km from ...
0
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2answers
403 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
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3answers
40 views

Data of worldwide shore lines and bathymetry

Please excuse my probably naive questions because I am new to this stack exchange. Is there a free database with all geolocations for shorelines? Is there a free database for near-shore bathymetry ...
0
votes
1answer
59 views

Determining if a Geodetic location is inside a polygon made up of Geodetic vertices

Suppose we have a polygon with Geotic vertices (Points A through E). Is there an algorithm that I can use that could determine If F is inside of it? In addition, what is the most efficient way to ...
1
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1answer
35 views

Difference between Positioning and Localization

I would like to know what are the differences between Positioning and Localization. In most papers they are used interchangeably. Are they the same? Does one come after another? I always thought ...
-1
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0answers
28 views

How do I convert this location data to regular latitude and longitude [duplicate]

I have some location data for silverstone racetrack but the lat and longs are in a wierd format that I don't recognise. Here is an example lat and long: +03124.10520,+00061.40430 What format is this ...
1
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0answers
9 views

Locating Wlan accesspoints-how? [closed]

Having a Netbook I would like to map routers geographically-how? Starting from scratch. Thanks a lot for your suggestions!
11
votes
3answers
2k views

Calculating the distance between a point and a virtual line of two lat/lngs

Please refer to the example and corresponding image. I would like to achieve the following: provide two locations (lat/lng), which are shown below as A and B. From this, a virtual line would be drawn ...
1
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1answer
59 views

What sub-meter geolocation solutions exist and how can I integrate them into a web and mobile mapping workflow?

I am the manager of seven water systems. What I am trying to do is map out every meter and valve on to a map and then my workers can have the maps on their iPhones so when they have to go fix a water ...
0
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0answers
23 views

Which are the most useful NMEA sentences for location based services

I am pretty new to GIS, I have been learning about all the different NMEA sentences from this website http://aprs.gids.nl/nmea/#allgp What is $GPGSV and $GPGSA and why are they useful to location ...
0
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0answers
14 views

Aggregated zoning (sq footage) records by town [duplicate]

Is there a database of zoning records where you can find the square footage by room of an address? I would like access to it to create a cost splitting application.
0
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0answers
41 views

Detecting esri markers within certain distance using ArcGIS JavaScript API?

I have a set of coordinates that is loaded from database. I would like to detect all the loaded markers that are close to each others which is within a certain distance. so the code is something ...
0
votes
1answer
69 views

Get lat/lon points from image pixels

I need to build an application with the following requirement: shows a map .png picture to user. then, users select several points around the map (I can get the x/y pixels from each point) based on ...
1
vote
4answers
365 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 ...
19
votes
1answer
5k 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 ...
3
votes
1answer
184 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 ...
8
votes
3answers
1k 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 ...
1
vote
1answer
77 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 ...
1
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0answers
191 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
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2answers
245 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 ...
3
votes
1answer
106 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
241 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
64 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
3answers
451 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 ...
1
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0answers
59 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
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2answers
61 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
83 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 ...
0
votes
1answer
600 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 ...
2
votes
1answer
253 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. ...
0
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0answers
857 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
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0answers
81 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: ...
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 ...
0
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2answers
245 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
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1answer
70 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
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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 , ...
0
votes
2answers
71 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 ...
9
votes
3answers
7k 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 ...
1
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1answer
196 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.
23
votes
3answers
8k views

Best GIS system for high performance web application - PostGIS vs MongoDB

I am working on a web/mobile application based on location data. Since i am already familiar with MongoDB, i found the geospatial indexing of mongo is quite suitable for my needs. As i am mainly ...
10
votes
2answers
105 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 ...
0
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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
715 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 ...
0
votes
1answer
131 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 ...
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) ...
1
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2answers
319 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 ...
15
votes
9answers
3k views

How can I determine the location of a visitor to my website?

If I want to provide a website with location appropriate content, what ways can I use to find the visitor's rough location using their IP or header information?
12
votes
2answers
422 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 , ...
3
votes
1answer
677 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 ...
1
vote
1answer
755 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 ...
8
votes
4answers
525 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 ...