如何将坐标转换为纬度&经度? [英] How do I convert coordinates to a Latitude & Longitude?

问题描述

我正在对运输可视化应用程序进行逆向工程.我需要找出其数据Feed来源的纬度.具体来说，XY 0,0是什么.我发现的唯一公式是计算两点之间的距离或方位/距离的位置.

I am reverse engineering a transportation visualization app. I need to find out the latitude for the origin of their data feed. Specifically what XY 0,0 is. The only formulas I have found calculate distance between two points, or location of a bearing/distance.

他们使用XY在非常旧的应用程序中显示地图. XY在FEET中.

They use the XY to display a map in a very legacy application. The XY is in FEET.

我有这些坐标:

47.70446615506108, -122.34469839507263: x=1268314, y=260622
47.774182540800616,-122.3412994737105:  x=1269649, y=286031
47.60024792289405, -122.32767331735774: x=1271767, y=222532
47.57012494413499, -122.29129609983679: x=1280532, y=211374

我需要找出x=0, y=0的纬度和经度以及找出该公式的公式.

I need to find out what the latitude and longitude of x=0, y=0 is and what the formula would be to find this out.

它们有两个数据源，一个数据流比另一个数据流大.具有最新数据的供稿不包含纬度，经度，而仅包含XY.我试图根据其当前电流较小但信息量更大(包括经纬度)的数据源进行推断，所以0,0是什么，因此我可以简单地将其(当前电流较大)数据源的XY坐标转换为纬度和经度.

They have two data feeds, one is more current than the other. The feed with the most current data does NOT include latitude, longitude, but only XY. I am trying to extrapolate based on their less current, yet more informative (includes lat, lon) data feed what 0,0 is so I can simply convert their (more current) data feed's XY coordinates to latitude and longitude.

推荐答案

问他们正在使用什么坐标系！ (或者，如果您从某个数据库中获取数据集，请查看该数据集的元数据，它应该告诉您.否则，我将怀疑其价值)

Ask them what coordinate system they're using! (or if you got the dataset from some database, look at the metadata for the dataset and it should tell you. Otherwise I'd be skeptical of its value)

这很可能是状态平面坐标系之一.它们用于地球上的局部区域(例如 UTM )，通常用于勘测.

Most likely this is one of the state plane coordinate systems. They're for localized areas of the earth (kind of like UTM), and are frequently used for surveying.

您可以使用 CORPSCON (或其他GIS程序； ExpertGPS 会执行此操作，但它不是免费的.我忘记了基准.WGS84和NAD83是非常接近，但NAD27不同.

You can use CORPSCON (or other GIS programs; ExpertGPS will do this if you have the GIS Option Pack but it's not free. I forget whether GPSBabel does conversion) to convert between lat/long and any of the state plane coordinate systems. You'll also need to know which datum the coordinates are in. WGS84 and NAD83 are very close but NAD27 is different.

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