geofence coordinates

1) What is geofence? According to Wikipedia, geofence (also called geo-fencing),"Geo-fenceIs a virtual perimeter for a real-world geographic area ." A geo-fence cocould be dynamically generated-as in a radius around a store or point location. or a geo-fence can be a predefined set of boundaries, like school attendance zones or neighborhood boundaries. custom-digitized geofences are also in use. 2)

1. Coordinate transformation when drawing in the CDC of the screen System logical coordinates —————— screen coordinates ———————— PDC logical coordinates We call GetWindowRect to get the screen coordinates size of the window. Because the default mapmode of the PDC is mm_text, we can fill the window directly using size a

World = Local Public Gameobject Mtarget; Public Gameobject Mpar; This note must be the first parent of the Mtarget object. Use the this for initialization void Start () { string tarstr = string. Format ("Mtarget local:{0},world:{1}", MTarget.transform.localPosition, mTarget.transform.position); String parstr = String. Format ("Mpar local:{0},world:{1}", MPar.transform.localPosition, mPar.transform.position); Debug.Log (TARSTR); Debug.Log (PARSTR); var t = m

Coordinates the device coordinates of the mouse event to the world coordinates. 1. First, describe the device coordinates, the viewport coordinates, and the world coordinates. Device coordinate: the unit

Document coordinates and viewport coordinates conceptsThe position of the element is measured in pixels, the right represents an increase in the x-coordinate, and downward represents the increase in the y-coordinate. However, there are two different points as the origin of the coordinate system: the x and y coordinates of the element can be relative to the upper-

u3d The relationship between screen coordinates, world coordinates, pixel coordinates In u3d, the screen coordinates and the world coordinate units are the direct one by one correspondence between the two, unaffected by screen resolution. By default, the bottom-left coordinate of the screen space canvas is the World o

1. PrefaceThe map itself is owned coordinates, generally can be broadly divided into planar coordinates and latitude and longitude coordinates, where we collectively referred to as geographical coordinates, such as Beijing, (115.9°e, 39.6°n) and (506340,304400) are their geographical

An example of super simple java getting the coordinates of the mouse and clicking the coordinates (the coordinates of the mouse on the Jframe), click the jframe 1. Place a JLabel label at the top of the window. The text in the label is "show the coordinates of right-click" by default" 2. Add a mouse event to the Jframe

In cctouchesbegan, how does one make the obtained coordinates relative to the coordinates of the entire screen, instead of the coordinates of the current view? In cocos2d, when we handle similar Touch events such as cctouchesbegan in cclayer, we usually use the followingCodeTo obtain the current user click position: Uitouch * Touch = [touches anyobject]; cg

GPS coordinates to Cartesian coordinates, gps coordinates CartesianAbstract We know that GPS coordinates are composed of longitude, latitude, and altitude. The precision and latitude are both angles, and the poster is the height. KDTree is often used for geographic-based search. When constructing a KDTree, GPS

/** * Created by Wandergis on 2015/7/8. * provided Baidu coordinates (BD09), geodetic coordinates (MARS coordinates, GCJ02), and WGS84 coordinate system between the conversion *///define some constants var X_pi = 3.14159265358979324 * 3000.0/180.0;var PI = 3.1415 926535897932384626;var a = 6378245.0;var ee = 0.00669342162296594323;/** * Baidu coordinate system (B

Screen coordinate system: the bottom right corner of the upper left corner is (0, 0) (1, 1) 2D Coordinate System of OGRE: in the upper left corner, the lower right corner is (1,-1) CEGUI coordinate system: the upper left corner is (0, 0), in pixels. Conversion Formula (mouse coordinates => 2D coordinates of OGRE) Void setCorners (float left, float top, float right, float bottom) { Left = left * 2-1;Right =

1. Rewrite the batch conversion js provided by Baidu to achieve 100 coordinate points at a time 2.Using recursive callbacks to control the return sequence of coordinate transformations to ensure that a set of coordinates (a set of 100) requested first arrives first First, let's take a look at two examples of coordinate transformation in the demo of Baidu Maps API: Convert original coordinates to Bai

The position of the element is measured in pixels, to the right represents an increase in the x-coordinate of the Y coordinate, but there are two different points as the origin of the coordinate system: the x and y coordinates of the elements can be relative to the upper-left corner of the document or the upper-left corner of the viewport that displays the document relative to the job. In the Rating window and tab, the viewport is just part of the br

Sticktoprogram Device coordinates and logical coordinates Windows applications use a logical unit for drawing graphics. The size of each logical unit is determined by the ing mode, this logical unit can be the same as the unit of the device (a pixel on the screen or printer) or a physical unit (such as millimeters ), it can also be a user-defined unit. In Windows applications, the ing mode is used whenever

First of all, I am a programmer (rookie programmer), with C # development, in the development process will encounter some problems, at that time, but in the encounter may also be committed, so inspired me to do such a study note series, one is to be able to urge themselves to summarize learning, Secondly, you can learn to grow up with like-minded friends on the road of Change, I write the wrong place also hope that friends can point out, there are any questions can leave a message, we can togeth

->properties->xy coordinate System tab, here can be modify,select, import way to select the coordinate system for the data! But there are a lot of people who think that the data itself has changed after the change. But that's not true! The information that is abbreviated here corresponds to the. aux file for that data! If you go to delete the file and re-view the file properties, you will still see the unknown! This is just a description of the data, just like you fill in the basic information r

There are many coordinate systems in Vc, and sometimes it is difficult to clearly distinguish between them. In general, there are logical coordinates and device coordinates, and there are intersections between coordinates. Logical coordinates are the coordinates used by the

This document records the transformation of point coordinates using the Go language for RESTful points.The mathematical relationship between polar coordinates and Cartesian coordinatesAssuming that the same point is represented as (ρ,θ) using polar coordinates, and the Cartesian coordinates are represented as (x, y), t

clc;close all;clear;%Mutual conversion of geographic coordinates and pixel coordinates [PIC,R]=geotiffread ('boston.tif'); %read a TIF image with geo-coordinate information [M,n,~]=size (pic);%convert pixel coordinates to geographic coordinates figure (1), Imshow (pic), title ('static picture without geographic