Linked Questions
70 questions linked to/from Measuring accuracy of latitude and longitude?
6
votes
2
answers
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" ...
- 285
3
votes
0
answers
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 ...
- 27.5k
1
vote
0
answers
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 ...
- 111
2
votes
0
answers
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....
- 51
1
vote
0
answers
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 ...
- 111
0
votes
0
answers
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 +...
- 1,567
0
votes
0
answers
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 ...
- 1
0
votes
0
answers
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 ...
- 101
30
votes
7
answers
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 ...
- 301
31
votes
1
answer
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 ...
- 329
14
votes
1
answer
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....
- 251
1
vote
1
answer
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="...
- 79
4
votes
3
answers
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 ...
- 143
5
votes
2
answers
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 ...
- 363
2
votes
3
answers
7k
views
Local Coordinate to Geocentric
The ultimate question, I need a transformation matrix to take a point in local space representing a roughly 500m x 500m place in New Mexico centered at -108.619987456 long 36.234600064 lat. The final ...
- 41