CN105005480A - Method for correcting software positioning deviation - Google Patents

Abstract

The invention discloses a method for correcting a software positioning deviation. The method comprises the following steps: 1) utilizing Android Location Manager system service to obtain position information; 2) processing the position information obtained in the step 1); and 3) displaying a longitude value and a latitude value obtained in the step 2) on map/positioning software, wherein the step 2) comprises the following specific steps: 21) obtaining the longitude value and the latitude value in a location object; and 22) converting the longitude value and the latitude value, and eliminating errors through conversion. The method for correcting the software positioning deviation can effectively correct the position display deviation problem of traditional map/positioning software and other pieces of software which needs to be positioned, position display precision is effectively improved, and more accurate geographic information can be provided for production and life.

Description

A kind of method of correcting software deviations

Technical field

The present invention relates to geographic position and determine technical field, specifically a kind of method of correcting software deviations.

Background technology

The location-based service that Android makes application access be supported by equipment by the class during android.location wraps.The core component of position framework is LocationManager system service, it provides some application programming interface to determine position.The GCJ-02 that survey office of domestic use state formulates encrypts first to geographic position, and the coordinate of map software on this basis, has carried out the measure of BD-09 superencipher.The longitude and latitude that the GPS module of Android mobile device gets just uses the data after GCJ-02 encryption, needs the data display after converting BD-09 encryption to just can obtain geographic position accurately.Therefore, the display of latitude and longitude information on positioning software that the GPS module of Android mobile device gets has deviation.

Summary of the invention

The problem to be solved in the present invention is to provide a kind of method of correcting software deviations, the position shown by software such as the method map/location can eliminating Android mobile device and the deviation of raw position data.

The method of correction software deviations of the present invention comprises the following steps:

1) Android LocationManager system service is utilized to obtain positional information:

11) newly-built LocationManager object;

12) newly-built positional information monitors function;

13) positional information is obtained;

2) positional information that step 1) obtains is processed:

21) longitude in location object and latitude value is obtained;

22) longitude and latitude value are changed;

3) by step 2) longitude that obtains and latitude value show on map/positioning software.

Step 22) method changed is:

221) longitude to be converted and latitude value are done Math.sqrt (x * x+y * y)+0.00002 * Math.sin (y * pi) conversion process to obtain a double offset and be designated as z; Latitude and longitude value to be converted is done the value that Math.atan2 (y, x)+0.000003 * Math.cos (x * pi) process obtains a double type and be designated as theta;

222) by step 221) z and theta that obtain process z * Math.cos (theta)+0.0065 and obtain the longitude after changing, process z * Math.sin (theta)+0.006 and obtain the latitude value after changing.

X wherein in expression formula, y represents longitude to be converted and latitude value, the representative of Math.sqrt () method is to the data extraction of square root in bracket, the representative of Math.sin () method removes sine value to the numerical value in bracket, " * " is multiplication sign, "+" is plus sige, pi is the numerical value of circular constant, Math.atan2 () is for calculating the angle angle value of planimetric coordinates point and the x-axis represented in bracket, and Math.cos () method is for calculating the cosine value of numerical value in bracket.

The method of correction software deviations of the present invention effectively can correct current map/positioning software and other relate to the position display offset issue needing the software of locating, effective raising position display precision, for production and life provide geography information more accurately.

Embodiment

Below a kind of method of correcting software deviations that the present invention proposes is described in detail.

A kind of method of correcting software deviations of the present invention, comprises the following steps:

The first step: utilize Android LocationManager system service to obtain positional information:

11, newly-built LocationManager object;

12, newly-built positional information monitors function;

13, positional information is obtained.

Code is as follows:

LocationManager lManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);

LocationListener liLocationListener = new LocationListener()

{

@Override

public void onStatusChanged(String provider, int status,

Bundle extras)

{

}

@Override

public void onProviderEnabled(String provider)

{

}

@Override

public void onProviderDisabled(String provider)

{

}

@Override

public void onLocationChanged(Location location)

{

Next step needs to process this location object

}

};

lManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,

0,

0,

liLocationListener);

Second step: the positional information got in the process first step, i.e. location object:

21, the longitude in location object and latitude value is obtained;

22, the conversion of this technical method is utilized to longitude and latitude value.

Concrete conversion regime is:

221) longitude to be converted and latitude value are done Math.sqrt (x * x+y * y)+0.00002 * Math.sin (y * pi) conversion process to obtain a double offset and be designated as z.Latitude and longitude value to be converted is done the value that Math.atan2 (y, x)+0.000003 * Math.cos (x * pi) process obtains a double type and be designated as theta.

222) by step 221) z and theta that obtain process z * Math.cos (theta)+0.0065 and obtain the longitude after changing, process z * Math.sin (theta)+0.006 and obtain the latitude value after changing.

X wherein in expression formula, y represents longitude to be converted and latitude value, the representative of Math.sqrt () method is to the data extraction of square root in bracket, the representative of Math.sin () method removes sine value to the numerical value in bracket, " * " is multiplication sign, "+" is plus sige, pi is the numerical value of circular constant, Math.atan2 () is for calculating the angle angle value of planimetric coordinates point and the x-axis represented in bracket, and Math.cos () method is for calculating the cosine value of numerical value in bracket.

Code is as follows:

public static double pi = 3.1415926535897932384626;

double latitude = location.getLatitude();

double longitude = location.getLongitude();

double x = longitude, y = latitude ;

double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * pi);

double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * pi);

double bd_lon = z * Math.cos(theta) + 0.0065;

double bd_lat = z * Math.sin(theta) + 0.006;

3rd step: the longitude that second step is obtained and latitude value, namely bd_lon and bd_lat value for showing in map software:

Such as, Baidu map api is utilized by bd_lon(longitude) and bd_lat(latitude) be set on map and show.

Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., it all should be encompassed in the middle of right of the present invention.

Claims (3)

1. correct a method for software deviations, it is characterized in that, comprise the following steps:

1) Android LocationManager system service is utilized to obtain positional information;

2) positional information that step 1) obtains is processed:

21) longitude in location object and latitude value is obtained;

22) longitude and latitude value are changed;

3) by step 2) longitude that obtains and latitude value show on map/positioning software.

2. the method for correction software deviations according to claim 1, is characterized in that, described step 22) method changed is:

221) longitude to be converted and latitude value are done Math.sqrt (x * x+y * y)+0.00002 * Math.sin (y * pi) conversion process to obtain a double offset and be designated as z; Latitude and longitude value to be converted is done the value that Math.atan2 (y, x)+0.000003 * Math.cos (x * pi) process obtains a double type and be designated as theta;

222) by step 221) z and theta that obtain process z * Math.cos (theta)+0.0065 and obtain the longitude after changing, process z * Math.sin (theta)+0.006 and obtain the latitude value after changing;

X wherein in expression formula, y represents longitude to be converted and latitude value, the representative of Math.sqrt () method is to the data extraction of square root in bracket, the representative of Math.sin () method removes sine value to the numerical value in bracket, " * " is multiplication sign, "+" is plus sige, pi is the numerical value of circular constant, Math.atan2 () is for calculating the angle angle value of planimetric coordinates point and the x-axis represented in bracket, and Math.cos () method is for calculating the cosine value of numerical value in bracket.

3. the method for correction software deviations according to claim 1, is characterized in that, the process that described step 1) obtains positional information is:

11) newly-built LocationManager object;

12) newly-built positional information monitors function;

13) positional information is obtained.