源事件奇怪的纬度经度 [英] Source event strange latitude & longitude

问题描述

我叫Cyrille，我正在开发一个代号为1的地图应用程序。目标是制作一个可以在用户周围搜索公司的应用程序（带有搜索栏），并将他们想要的公司添加到列表中。然后，列表出现在主窗口中，然后单击它们在地图上显示它。

My name is Cyrille and i'm working on a map app on codename one. The goal is to make an app that can search around the user for companies (with a search bar) and add companies they want to a list. Then the list appear in the main window and clicking on them show it on the map.

我对代号为1的事件部分有疑问。这是我的代码的一部分：

I've got a problem with the event part on codename one. Here's a part of my code :

PointLayer point = new PointLayer(new Coord(lat.doubleValue(), lng.doubleValue()),
                            companyName, null);
                    pl.addPoint(point);
                    pl.addActionListener(new ActionListener() {
                        public void actionPerformed(ActionEvent evt) {
                            PointLayer p = (PointLayer) evt.getSource();
                            System.out.println("pressed " + p);
                            Dialog.show("Details", "" + p.getName() + "\nLatitude: " + p.getLatitude() + "\nLongitude: " + p.getLongitude(), "Ok", null);
                        }
                    });

是的，我使用了基本地图模板^^'
我的问题是：当我问我得到的点的坐标：

Yes I took the basic map template ^^' My problem is : When i ask for the coordonates of point I get :

{'经度'：2.3485853，'纬度'：48.8769309}

{'longitude':2.3485853, 'latitude':48.8769309}

，但是当我要求evt.getSource的同伙时，我得到：

but when I ask for the coordonates of evt.getSource i get :

{'longitude'：261443.31964417442，'latitude'：6254004.882818963}

{'longitude':261443.31964417442,'latitude':6254004.882818963}

这有点令人不安...

which is kind of perturbing ...

自昨天以来，我一直在互联网上浏览，但是没有找到任何东西，也许我没有在正确的位置进行搜索。

I looked over the internet since yesterday but i didn't find any thing, maybe i'm not searching at the right place. Any clue of what's happening ?

编辑：
多亏了答复者，我才发现了问题。密码被用于另一系统，代号为：Popular Visualization CRS Mercator。为了使用它，您必须将其转换为：com.codename1.maps.Mercator.inverseMercator（latitude，经度）;
或者您可以使用Google标记而不是代号人的[这就是我所做的]

EDIT : Thanks to the replyers i found the issue. The coordonates was given in an other system use by codename one : Popular Visualisation CRS Mercator. In order to use it you have to convert it with : com.codename1.maps.Mercator.inverseMercator(latitude, longitude); Or you can use google marker instead of codename one's [That's what i did]

推荐答案

我认为您的坐标事件发生在流行可视化CRS墨卡托（EPSG：900913或EPSG：3785）坐标系中，这是地图控件使用的坐标系。在纬度/经度中添加的点在添加到地图时会自动转换为该系统。 纬度和经度略有误导； x和 y是投影坐标的标准术语。

I think the coordinates you get in the event are in the Popular Visualisation CRS Mercator (EPSG:900913 or EPSG:3785) coordinate system, which is what the map control uses. The points you add in lat/lon are automatically transformed to this system when added to the map. "latitude" and "longitude" are slightly misleading; "x" and "y" are the standard terms for projected coordinates.

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