Java, convert lat/lon to UTM
I was able to use Geotools 2.4 to get something that works, based on some example code.
double utmZoneCenterLongitude = ... // Center lon of zone, example: zone 10 = -123
int zoneNumber = ... // zone number, example: 10
double latitude, longitude = ... // lat, lon in degrees
MathTransformFactory mtFactory = ReferencingFactoryFinder.getMathTransformFactory(null);
ReferencingFactoryContainer factories = new ReferencingFactoryContainer(null);
GeographicCRS geoCRS = org.geotools.referencing.crs.DefaultGeographicCRS.WGS84;
CartesianCS cartCS = org.geotools.referencing.cs.DefaultCartesianCS.GENERIC_2D;
ParameterValueGroup parameters = mtFactory.getDefaultParameters("Transverse_Mercator");
parameters.parameter("central_meridian").setValue(utmZoneCenterLongitude);
parameters.parameter("latitude_of_origin").setValue(0.0);
parameters.parameter("scale_factor").setValue(0.9996);
parameters.parameter("false_easting").setValue(500000.0);
parameters.parameter("false_northing").setValue(0.0);
Map properties = Collections.singletonMap("name", "WGS 84 / UTM Zone " + zoneNumber);
ProjectedCRS projCRS = factories.createProjectedCRS(properties, geoCRS, null, parameters, cartCS);
MathTransform transform = CRS.findMathTransform(geoCRS, projCRS);
double[] dest = new double[2];
transform.transform(new double[] {longitude, latitude}, 0, dest, 0, 1);
int easting = (int)Math.round(dest[0]);
int northing = (int)Math.round(dest[1]);
Need to convert latitude and longitude to UTM with specific zone in Java
What I did was to use this converter and then changed the code a little. In the class LatLon2UTM's setVariables(double latitude, double longitude) method I changed the zone variable var1 to 33 and removed the calculation that calculated the real UTM zone.
original:
var1 = ((int) (longitude / 6)) + 31;
new:
var1 = 33;
Nothing great, but at least now I can convert to the zone I want!
Easiest way convert UTM ZONE to lat long
In order to convert UTM coordinates (easting and northing) to latitude and longitude you need the zone number and zone letter as well.
Without these your easting / northing values could be in any of the 60 zones defined by UTM.
As for libraries, there are packages for Python, Javascript and probably others.
Sample for JS:
utm.toLatLon(easting, northing, zoneNum, zoneLetter)
//returns { latitude, longitude }
utm.fromLatLon(latitude, longitude)
//returns { easting, northing, zoneNum, zoneLetter }
Java library that converts latitude/longitude to MGRS coordinates and vice versa?
I know this is an old post, but I'll add some more for posterity. JCoords has an MGRS point conversion, but it requires a small licensing fee. Another source is NASA's WorldWind project (similar to Google Earth), which converted the old GeoTrans API created by NGA. This is the implementation of the MGRS conversion: MGRSCoordConverter.java
Converting longitude/latitude to X/Y coordinate
The big issue with plotting maps is that the spherical surface of the Earth cannot be conveniently converted into a flat representation. There are a bunch of different projections that attempt to resolve this.
Mercator is one of the simplest: it assumes that lines of equal latitude are parallel horizontals, while lines of equal longitude are parallel verticals. This is valid for latitude (1 degree of latitude approximately equals 111 km no matter where you are), but not valid for longitude (the surface distance of a degree of longitude is proportional to the cosine of the latitutude).
However, as long as you're below about 45 degrees (which most of Minnesota is), a Mercator projection works very well, and creates the forms that most people will recognize from their grade school maps. And it's very simple: just treat the points as absolute coordinates, and scale to whatever space you're drawing them in. No trig necessary.
How to convert latitude or longitude to meters?
Here is a javascript function:
function measure(lat1, lon1, lat2, lon2){ // generally used geo measurement function
var R = 6378.137; // Radius of earth in KM
var dLat = lat2 * Math.PI / 180 - lat1 * Math.PI / 180;
var dLon = lon2 * Math.PI / 180 - lon1 * Math.PI / 180;
var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) *
Math.sin(dLon/2) * Math.sin(dLon/2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
var d = R * c;
return d * 1000; // meters
}
Explanation: https://en.wikipedia.org/wiki/Haversine_formula
The haversine formula determines the great-circle distance between two points on a sphere given their longitudes and latitudes.
How to find UTM zone using current latitude and longitude in android?
You also see that answer for get time utm as you want
demo(36.7783,-119.4175);
demo function
private void demo(double Lat, double Lon)
{
Zone= (int) Math.floor(Lon/6+31);
System.out.println("Zone"+Zone);
if (Lat<-72)
Letter='C';
else if (Lat<-64)
Letter='D';
else if (Lat<-56)
Letter='E';
else if (Lat<-48)
Letter='F';
else if (Lat<-40)
Letter='G';
else if (Lat<-32)
Letter='H';
else if (Lat<-24)
Letter='J';
else if (Lat<-16)
Letter='K';
else if (Lat<-8)
Letter='L';
else if (Lat<0)
Letter='M';
else if (Lat<8)
Letter='N';
else if (Lat<16)
Letter='P';
else if (Lat<24)
Letter='Q';
else if (Lat<32)
Letter='R';
else if (Lat<40)
Letter='S';
else if (Lat<48)
Letter='T';
else if (Lat<56)
Letter='U';
else if (Lat<64)
Letter='V';
else if (Lat<72)
Letter='W';
else
Letter='X';
Easting=0.5*Math.log((1+Math.cos(Lat*Math.PI/180)*Math.sin(Lon*Math.PI/180-(6*Zone-183)*Math.PI/180))/(1-Math.cos(Lat*Math.PI/180)*Math.sin(Lon*Math.PI/180-(6*Zone-183)*Math.PI/180)))*0.9996*6399593.62/Math.pow((1+Math.pow(0.0820944379, 2)*Math.pow(Math.cos(Lat*Math.PI/180), 2)), 0.5)*(1+ Math.pow(0.0820944379,2)/2*Math.pow((0.5*Math.log((1+Math.cos(Lat*Math.PI/180)*Math.sin(Lon*Math.PI/180-(6*Zone-183)*Math.PI/180))/(1-Math.cos(Lat*Math.PI/180)*Math.sin(Lon*Math.PI/180-(6*Zone-183)*Math.PI/180)))),2)*Math.pow(Math.cos(Lat*Math.PI/180),2)/3)+500000;
Easting=Math.round(Easting*100)*0.01;
System.out.println("Easting"+Easting);
Northing = (Math.atan(Math.tan(Lat*Math.PI/180)/Math.cos((Lon*Math.PI/180-(6*Zone -183)*Math.PI/180)))-Lat*Math.PI/180)*0.9996*6399593.625/Math.sqrt(1+0.006739496742*Math.pow(Math.cos(Lat*Math.PI/180),2))*(1+0.006739496742/2*Math.pow(0.5*Math.log((1+Math.cos(Lat*Math.PI/180)*Math.sin((Lon*Math.PI/180-(6*Zone -183)*Math.PI/180)))/(1-Math.cos(Lat*Math.PI/180)*Math.sin((Lon*Math.PI/180-(6*Zone -183)*Math.PI/180)))),2)*Math.pow(Math.cos(Lat*Math.PI/180),2))+0.9996*6399593.625*(Lat*Math.PI/180-0.005054622556*(Lat*Math.PI/180+Math.sin(2*Lat*Math.PI/180)/2)+4.258201531e-05*(3*(Lat*Math.PI/180+Math.sin(2*Lat*Math.PI/180)/2)+Math.sin(2*Lat*Math.PI/180)*Math.pow(Math.cos(Lat*Math.PI/180),2))/4-1.674057895e-07*(5*(3*(Lat*Math.PI/180+Math.sin(2*Lat*Math.PI/180)/2)+Math.sin(2*Lat*Math.PI/180)*Math.pow(Math.cos(Lat*Math.PI/180),2))/4+Math.sin(2*Lat*Math.PI/180)*Math.pow(Math.cos(Lat*Math.PI/180),2)*Math.pow(Math.cos(Lat*Math.PI/180),2))/3);
if (Letter<'M')
Northing = Northing + 10000000;
Northing=Math.round(Northing*100)*0.01;
System.out.println("Northing"+Northing);
}
as our discussion you need to convert to utm as calfornia lat long.... Please see this link for lat long take like that.... and do this...
https://gis.stackexchange.com/questions/120083/converting-a-california-coordinate-system-zone-6-value
I bet those values are US survey feet, and based on the document, also on NAD 1927, not NAD 1983.
The app you're using is using the NAD 1983 definitions of the State Plane zones. The parameters are different, so you're not going to be able to convert NAD 1927 coordinates using it.
If I convert the given values (cropping to integers) using the NAD 1927 definition, I get
longitude = -116.591154
latitude = 33.0709033
Please view this Link also......
Java, convert lat/lon to UTM
double utmZoneCenterLongitude = ... // Center lon of zone, example: zone 10 = -123
int zoneNumber = ... // zone number, example: 10
double latitude, longitude = ... // lat, lon in degrees
MathTransformFactory mtFactory = ReferencingFactoryFinder.getMathTransformFactory(null);
ReferencingFactoryContainer factories = new ReferencingFactoryContainer(null);
GeographicCRS geoCRS = org.geotools.referencing.crs.DefaultGeographicCRS.WGS84;
CartesianCS cartCS = org.geotools.referencing.cs.DefaultCartesianCS.GENERIC_2D;
ParameterValueGroup parameters = mtFactory.getDefaultParameters("Transverse_Mercator");
parameters.parameter("central_meridian").setValue(utmZoneCenterLongitude);
parameters.parameter("latitude_of_origin").setValue(0.0);
parameters.parameter("scale_factor").setValue(0.9996);
parameters.parameter("false_easting").setValue(500000.0);
parameters.parameter("false_northing").setValue(0.0);
Map properties = Collections.singletonMap("name", "WGS 84 / UTM Zone " + zoneNumber);
ProjectedCRS projCRS = factories.createProjectedCRS(properties, geoCRS, null, parameters, cartCS);
MathTransform transform = CRS.findMathTransform(geoCRS, projCRS);
double[] dest = new double[2];
transform.transform(new double[] {longitude, latitude}, 0, dest, 0, 1);
int easting = (int)Math.round(dest[0]);
int northing = (int)Math.round(dest[1]);
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