OpenLayers 将坐标调整为 0,0

发布于 2024-12-11 01:58:18 字数 511 浏览 1 评论 0原文

坦白说，我是 OpenLayers 的新手。我有一个 WGS84 坐标数据库，已将其加载到数据库中。我已经通过回显纬度和经度验证了这一点。

map = new OpenLayers.Map("map");
var mapnik = new OpenLayers.Layer.OSM();
map.addLayer(mapnik);
map.setCenter(new OpenLayers.LonLat(<?php echo $lat;?>, <?php echo $lon;?>).transform(
   new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
   new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection
), 4 /*Zoom level*/);

当放入此处时，会将地图移动到 0,0。谁能帮助或指出我正确的方向？

原文

To be blunt, I'm new to OpenLayers. I have a database of WGS84 coordinates which I've loaded into a database. I've verified that this works by echoing latitudes and longitudes.

map = new OpenLayers.Map("map");
var mapnik = new OpenLayers.Layer.OSM();
map.addLayer(mapnik);
map.setCenter(new OpenLayers.LonLat(<?php echo $lat;?>, <?php echo $lon;?>).transform(
   new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
   new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection
), 4 /*Zoom level*/);

When putting into here, it moves the map to 0,0. Can anyone help or point me in the right direction?

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执着的年纪 2024-12-18 01:58:18

@Niels 的推荐是正确的。
OpenLayers LonLat 对象需要 (经度, 纬度) - 而不是 (纬度, 经度)。

只需交换经纬度的顺序即可：

map.setCenter(new OpenLayers.LonLat(<?php echo $lon;?>, <?php echo $lat;?>).transform(
    new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
    new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection
), 4);

The commend by @Niels is correct.
The OpenLayers LonLat object expects (longitude, latitude) - not (latitude, longitude).

Just swap the order of your lat and lon:

map.setCenter(new OpenLayers.LonLat(<?php echo $lon;?>, <?php echo $lat;?>).transform(
    new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
    new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection
), 4);

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