I'm receiving a strange Latitude Longitude response from my GPS.
The message is the following:
CGPSINF:0,3948.873779,730.434240,351.238801,20150325115857.283,2,11,0.112258,0.000000"
I know that the latitude is 3948.873779 and the longitude is 730.434240
but how can I convert these to decimal ?
Decimal Degrees = Degrees + minutes/60 + seconds/3600
Related
I have a set of Lat-long values of various locations on the map.
Eg.
(18.605906724686033, 73.14103329678608)
(18.606069075261992, 73.13979277511669)
(18.606066194308486, 73.13996845980716)
(18.60624633887108, 73.1400100340469)
I need to plot them in a graph (in meters) with the first position as the origin.
Please help me with the formulae for the conversion.
Thank you for answering.
x0= 18.605906724686033 //origin longitude
y0= 73.14103329678608 //origin latitude
x1= 18.606069075261992 //longidute
y1= 73.13979277511669 //latitude
dlong=x1-x2
dlat=y1-y2.
x=dlong*111139. //the x-cordinate for the given longitude
y=dlat*111190 //The y-cordinate for the given latitude
I have :
+37.785834 (lat)
-122.406417 (long)
The LAT positive means North of the equator
The LONG negative means to the West of 0
So far so good.
But what does the number represent exactly ? For example suppose I added 0.000001 to the LAT what would this actually represent ? That I have moved in some Northerly direction by 1 metre, for example or....
If I understand what these numbers actually represent then I can use them intelligently.
Longitude and latitude are measured in degrees. The latitude ranges from -90° (south pole) to +90° (north pole). The longitude ranges from -180° to +180°.
Given two gps coordinates the length difference can be calculated by using the haversine formula. But what about the other way around:
Compute the length difference in meter for a given Lat/Long double
Compute the Lat/Long double for a given length in meters
I know this is not exactly possible since it differs from the point on the earth you are, but is it possible to approximate this or something similiar? This does not have to be very precise.
If your displacements aren't too great (less than a few KM), use the quick and dirty estimate that 111,111 meters in the y direction is 1 degree (of latitude) and 111,111 * cos(latitude) meters in the x direction is 1 degree (of longitude).
Alternatively:
//Position, decimal degrees
lat = 51.0
lon = 0.0
//Earth’s radius, sphere
R=6378137
//offsets in meters
distanceNorth = 100
distanceEast = 100
//Coordinate offsets in radians
dLat = distanceNorth/R
dLon = distanceEast/(R*Cos(Pi*lat/180))
//OffsetPosition, decimal degrees
latO = lat + dLat * 180/Pi
lonO = lon + dLon * 180/Pi
This should return:
latO = 51,00089832
lonO = 0,001427437
currently i work a geo-relevent app use google map,
but i don't have much knowledge about Geography,so i want to ask what't latitude & longitude
scope min to max
e.g
lat 37.314
long 40.7302
min/max values are:
Latitude: -90 to 90
Equator is 0. South Pole is -90 and North Pole is 90
Longitude: -180 to 180
Prime Meridian (Greenwich, England) is 0
International Dateline is 180
I have latitude and longitude of a point.I have to find out the latitude and longitude of another point from a relative distance from the known point.For example point A has some location with latitude and longitude.What is the latitude and longitude after moving 1000m south and 500m west from point A.Is there any direct equation to find this? Thanks in advance
Note the accepted answer is basically the flat earth projection equations:
x = δlon * EarthRadius * cos( lat )
y = δlat * EarthRadius
For better accuracy over larger distances, you should compute the final lat/lon from a typical bearing/range calculation. See the section Destination point given distance and bearing from start point at this website: http://www.movable-type.co.uk/scripts/latlong.html
Instead of looking up an equation you can calculate as follows. Let R be the radius of the Earth. Let a be the current latitude and b be the current longitude. Then if you move δx metres east (negative for west) then δy metres south, calculating the new longitude can be done as follows.
Intersecting a horizontal plane with the Earth at the current latitude will give you a circle of radius R*cos(a). So to convert δx to the change in longitude, you get something like
δlong = δx * 2π / (2π * R * cos(a)) = δx / (R * cos (a))
The change in latitude is easier, since it doesn't depend on the current position. You're always moving around a great circle through the two poles. Then δlat = δy / R. (Of course you need to mod out by 2 π at some point).