GIS工具maptalks开发手册(二)01-02之GeoJSON转化为Geometry—

GIS工具maptalks开发手册(二)01-02之GeoJSON转化为Geometry——渲染点

news2024/12/22 19:50:05

GIS工具maptalks开发手册(二)01-02之GeoJSON转化为Geometry——渲染点

效果

在这里插入图片描述

1、html官方版

<!DOCTYPE html>
<html>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>JSON序列化 - GeoJSON转化为Geometry</title>
<style type="text/css">
    html,
    body {
        margin: 0px;
        height: 100%;
        width: 100%;
    }

    .container {
        width: 900px;
        height: 500px;
        margin: 50px;
    }
</style>
<link rel="stylesheet" href="https://unpkg.com/maptalks/dist/maptalks.css">
<script type="text/javascript" src="https://unpkg.com/maptalks/dist/maptalks.min.js"></script>

<body>

    <div id="map" class="container"></div>
    <script>
        var map = new maptalks.Map('map', {
            center: [-0.113049, 51.498568],
            zoom: 14,
            baseLayer: new maptalks.TileLayer('base', {
                urlTemplate: 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
                subdomains: ['a', 'b', 'c', 'd'],
                attribution: '&copy; <a href="http://osm.org">OpenStreetMap</a> contributors, &copy; <a href="https://carto.com/">CARTO</a>'
            }),
            layers: [
                new maptalks.VectorLayer('v')
            ]
        });

        var json = {
            'type': 'Feature',
            'geometry': {
                'type': 'Point',
                'coordinates': [-0.113049, 51.498568]
            },
            'properties': {
                'name': 'point marker'
            }
        };
        var marker = maptalks.GeoJSON.toGeometry(json).addTo(map.getLayer('v'));

    </script>
</body>

</html>

1、html改造版

<!DOCTYPE html>
<html>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>JSON序列化 - GeoJSON转化为Geometry</title>
<style type="text/css">
    html,
    body {
        margin: 0px;
        height: 100%;
        width: 100%;
    }

    .container {
        width: 900px;
        height: 500px;
        margin: 50px;
    }
</style>
<link rel="stylesheet" href="https://unpkg.com/maptalks/dist/maptalks.css">
<script type="text/javascript" src="https://unpkg.com/maptalks/dist/maptalks.min.js"></script>

<body>

    <div id="map" class="container"></div>
    <script>
        var map = new maptalks.Map('map', {
            center: [-0.113049, 51.498568],
            zoom: 14,
            baseLayer: new maptalks.TileLayer('base', {
                urlTemplate: 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
                subdomains: ['a', 'b', 'c', 'd'],
                attribution: '&copy; <a href="http://osm.org">OpenStreetMap</a> contributors, &copy; <a href="https://carto.com/">CARTO</a>'
            }),
            layers: [
                new maptalks.VectorLayer('v')
            ]
        });

        var json = {
            'type': 'Feature',
            'geometry': {
                'type': 'Point',
                'coordinates': [-0.113049, 51.498568]
            },
            'properties': { // 特性
                'name': 'point marker-点标记'
            }
        };
        var marker = maptalks.GeoJSON.toGeometry(json);
        marker.addTo(map.getLayer('v'));

    </script>
</body>

</html>