geographic coordinates

Research on Reversible Algorithm for Inter-conversion between Geographic Coordinates and Rectangular Coordinates

地理坐标和直角坐标相互转换可逆算法的研究

Secondly, then the article describes the key technologies of the system: GPS simulation, the conversion of the address and geographic coordinates, Baidu map operations, application installation and deployment and other difficult problems.

接着本文介绍了系统实现的关键技术：GPS模拟、Android权限问题、在百度地图上作业、应用程序安装部署等难点问题。

Most of the electronic sea chart navigation systems available measure the geographic coordinates of a ship by the GPS ( i.e. global position system), so that it is necessary for the electronic sea chart system to test timely the precision of the GPS by radar signals.

现有的电子海图导航系统主要靠全球定位系统（GPS）来测量舰船的地理坐标，用雷达信号适时检验GPS的定位精度就成为电子海图系统不可少的功能。

Whether derived from address information, acquired by GPS devices, or otherwise generated, many databases contain geographic coordinates of point locations as separate numeric columns in a table.

无论是从地址信息中推导出来的、由GPS设备获得的还是以其他方式生成的，许多数据库都包含点位置的地理坐标，这些信息在数据库中保存为单独的数字列。

The Magnus web app takes on a rather small slice of this potential: it pulls and presents data related to geographic coordinates, times, and user accounts.

Magnus web应用程序呈现了这种可能性的一小部分：它提取并呈现与地理坐标、时间和用户帐户相关的数据。

In this paper, examples are given to show how to calculate from navigation positioning data the required variables and corresponding RMS errors which are used to work out Eotvos corrections, and the geographic coordinates of every gravity station.

文中举例说明如何根据导航定位数据求出所需的用于计算厄缶校正的各个变量和相应的均方误差，以及各个重力测点的地理位置。

In the support of computer software and hardware, GIS can process spatial data by geographic coordinates or space positions, and can manage space data, research of effective space entities and their mutual relationship.

在计算机软硬件支持下，它可以对空间数据按地理坐标或空间位置进行各种处理，对数据有效管理，研究各种空间实体及相互关系。

Measurement Model of Digital Maps Based on Geographic Coordinates

基于地理坐标的数字地图量算模型

The latitude and longitude system is probably the best known way to designate geographic coordinates.

经纬度系统可能是最为人熟知的地理坐标设计方法。

Hydrologic Digital Earth ( HDE) is a comprehensive model which contains a large amount of hydrologic information based on geographic coordinates. This model can handle different hydrological problems in a new manner.

水文数字地球（HDE）是将水文信息按地理坐标集成，构筑全球水文信息模型，以全新方式处理水文各种问题，与其他信息相融合，为解决水文难题提供崭新的途径。

Looking at the sample contents table, you can see that a country's geographic coordinates and area are always given in the same format.

查看示例内容表，可以看到国家的地理坐标和面积总是采用相同的格式。

Therefore, this paper studies the actual geographical data to solve the TSP, and details a discrete PSO algorithm model based on geographic coordinates for solving the practical TSP.

因此，本文以实际地理数据作为TSP问题的研究对象，详述了基于地理坐标的离散PSO算法求解TSP问题的模型，用于解决实际问题。

Reducing the scale may be considered to be part of transforming geographic coordinates plane coordinates.

另外,还原地图比例尺也可以被认为是坐标变换过程的一部分.

The main achievements are summarized as follows: ( 1) Conversion of the topography from geographic coordinates to Cartesian coordinates is performed through Gauss-Kruger projection. The tidal current numerical model for Bohai Sea is established under the Cartesian coordinates.

主要成果总结如下：（1）采用高斯&克吕格（Gauss-Kruger）投影将经纬度坐标系下的地形转化为直角坐标，建立了笛卡尔坐标系下渤海海域的潮流数值模拟模型。

For quasi-real-time method, the real-values of COG and SOG are calculated by Mid-Latitude, Mercator or Bowring sailing method, the geographic coordinates obtained from DGPS are taken as the original datum of the three sailing method s.

在准实时法中，利用差分卫星定位仪给出的地理坐标，根据中分纬度法、墨卡托法或波林法算得航迹向与对地速度的真值。

Its major features include synchronous array remote surveys for different geographic coordinates points with high signal to noise ratio, high resolution and good effectiveness.

主要特点有：同步阵列遥测不同地理坐标点的电磁场，具有高信噪比、高分辨率和高效率；

In this paper, the geocoding technology which assigning geographic coordinates to the actual address is introduced to implement ETL with a system structure.

将地理编码技术引入到空间数据仓库ETL中，给出了融合地理编码模块的ETL体系机构。

In addition, the transverse angular rate can be decomposed into the yaw angular rate and pitch angular rate with the geographic coordinates of reference.

此外，配合地理坐标基准，可以将横向角速度分解为偏航角速度和俯仰角速度。

Based on the relationship between the geographic coordinates of the ship and the radio, the target direction could be ascertained.

本文根据运动载体与固定电台的地理坐标关系，推导出了天线目标指向的计算式。

To solve the problems of difference geographic coordinates transformation, the paper adopts the methods of establishing general coordinate transformation class, and implements the coordinate transformation.

为了解决地图制图中不同坐标系之间的相互转换的问题，采用构建通用地理坐标转换类方法，实现常用大地坐标系和平面投影坐标系之间在相同或不同参考椭球参数下的相互转换。

By analyzing the theory of geographic coordinates and rectangular coordinates interconversion, algorithmic researches and completion of coordinate conversion programming has been discussed.

通过对地理坐标与地面直角坐标相互转换原理的分析，论述了坐标转换和算法研究及实现方法。此方法具有良好的精确性和实时性，完全能够满足军事领域应用的需要。

Design and implementation of general geographic coordinates transformation class

通用地理坐标转换类设计与实现

The geographic coordinates of every registry were determined artificially and the equations of trend-surface were established. 3.

人工确定各个登记点的地理坐标，结合各个登记点的标准化死亡率建立趋势面方程。

The coordinate values represent latitude and longitude: "geographic" coordinates, not projected ones.

坐标值代表纬度和经度：“地理”坐标，不是投影坐标。

A GIS is an information system based on geographic coordinates with advanced capabilities consulting spatial data.

它是一个以地理坐标为基础的信息系统，具有强大的处理空间数据的能力。

While geographic coordinates can be used to represent point locations anywhere, they are not suitable for defining lines of appreciable length or computing distances.

地理坐标可以用来表示任何地方的点位置，但是不适合定义具有可度量长度的直线或计算距离。

In 1972 divers raised a gigantic foot from about the same location, although precise geographic coordinates were not taken.

尽管没有标下精确的地理坐标，1972年潜水员从同一地点打捞上来一个巨大的脚掌。

With geographic coordinates, the features can then be mapped and entered into Geographic Information Systems.

有了地理坐标, 地理特征就可以被显示到地图上或运用到地理信息系统中.