70 questions linked to/from Measuring accuracy of latitude and longitude?
55k views

### Precision of x decimal points in meters? [duplicate]

Is there a handy reference that corelates the number of decimal points in a coordinate to the precision in meters? I had discussions like "4 decimal places will place you within a 500 meter radius" ...
295 views

### Decimal degree coordinates: how many decimal places to use for ...? [duplicate]

When using coordinates in decimal degrees, how many decimal points actually make sense? For example, say one is producing a table of locations of base camps in a report, there's no point in ...
1 vote
214 views

### Converting DMS to decimal degrees, what precision? [duplicate]

I'm working on a piece of software that converts Lat & Long from DMS (35° 19′ 20″ N) to decimal degrees. At the moment, the code creates number with 16 digits after the decimal point, which seems ...
176 views

### Degree Precision vs. Length [duplicate]

https://en.wikipedia.org/wiki/Decimal_degrees I found this chart in one of the questions here. Additional to this: When making a measurement and getting 2 Measures of Latitude, for example 51....
1 vote
163 views

### Is there a standard as to how many meters or feet if a GPS number (latitude and longitude) is off by a tiny amount, such as 0.0001? [duplicate]

For example, if the latitude and longitude is 25.1054, 121.5973 then what if it is off by a small amount, such as 0.0001: 25.1055, 121.5974 Then can it readily tell how many feet or meters it is ...
142 views

### How can I tell the accuracy of coordinates conversion by cs2cs? [duplicate]

For example, when I try this: cs2cs +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs +to +proj=tmerc +lat_ 0=22.31213333333334 +lon_0=114.1785555555556 +k=1 +x_0=836694.05 +y_0=819069.8 + ellps=intl +...
25 views

### What is the accuracy of DMS coordinates that don't contain any seconds [duplicate]

For example, if I have coordinates for latitude 50°52'N, about how accurate are these coordinates? Within 10 km? 100 km? All the information I'm seeing is about decimal degrees, and I could convert ...
17 views

### can lat long of a place could have different precision from google maps [duplicate]

When I select for lat long in google maps I could see the precision after decimal places are same for both, for an instance a place could have [12.941963598406998 {15} , 77.60827701942743 {15 ]( both ...
12k views

### Calculating intersection of two Circles

I'm trying to figure out how to mathematically derive the common points of two intersecting circles on earth's surface given a center Lat/Lon and a radius for each point. For example, given: Lat/Lon ...
42k views

### What is the precision of Geohash?

I would like to know the precision of a Geohash with a given length. If there is a 'simple' formula you can use to calculate it, that would be extra-cool. Wikipedia lists the precision up to 8 ...
54k views

### Converting geographic coordinate system in R

I have points in geographic coordinate system and I wanted to convert them to swiss grid (CH1903+). Sample data: id lon lat 2 7.173500 45.86880 3 7.172540 45.86887 4 7.171636 45....
1 vote
74k views

### display latitude and longitude on googlemaps on click

I am trying to retrieve latitude and longitude values. When the user clicks on the google map, latitude and longitude values should be displayed in the text boxes. My code is: <%@ Page Language="...
30k views

### Converting from an x-y coordinate system to latitude/longitude

I'm building an indoor wifi-based tracking system that can calculate the position of a device in meters relative to the sensors distributed throughout the building. So far I've gotten to the point ...
20k views

### How to calculate new point coordinates from distance and angle using ArcGIS SDK for iOS?

I want to calculate the coordinates of a new point. What I have: The source point coordinates, the distance (meters) and the angle For example: I want to create a point within 100 meters and 45 ...