GEE 底图加载——自定义底图样式加载案例分析（含免费引如多款底图）

2024-03-08 21:12
文章标签 分析 加载 自定义 案例 免费 样式 gee 多款 底图 引如

本文主要是介绍GEE 底图加载——自定义底图样式加载案例分析（含免费引如多款底图），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

在本教程中，您将学习如何更改地图对象的选项，以便为底层基础地图定义自己的样式。

地球引擎中的默认地图

地球引擎的基础地图是 Google Map API 中的地图。默认选项包括

  • roadmap，显示默认的路线图视图、
  • 卫星，显示谷歌地球卫星图像、
  • 混合视图，显示普通视图和卫星视图的混合视图，以及
  • 地形：显示基于地形信息的物理地图。

函数

Map.setOptions(mapTypeId, styles, types)

Modifies the Google Maps basemap. Allows for:

1) Setting the current MapType. 2) Providing custom styles for the basemap (MapTypeStyles). 3) Setting the list of available mapTypesIds for the basemap.

If called with no parameters, resets the map type to the google default.

Returns the map.

修改 Google 地图基图。允许

1) 设置当前地图类型。2) 为基图提供自定义样式（MapTypeStyles）。3) 为基图设置可用的 mapTypesIds 列表。

如果调用时没有参数，则将地图类型重置为谷歌默认类型。

返回地图。

Arguments:

mapTypeId (String, optional):

A mapTypeId to set the basemap to. Can be one of "ROADMAP", "SATELLITE", "HYBRID" or "TERRAIN" to select one of the standard Google Maps API map types, or one of the keys specified in the opt_styles dictionary. If left as null and only 1 style is specified in opt_styles, that style will be used.

styles (Object, optional):

A dictionary of custom MapTypeStyle objects keyed with a name that will appear in the map's Map Type Controls. See: https://developers.google.com/maps/documentation/javascript/reference#MapTypeStyle

types (List<String>, optional):

A list of mapTypeIds to make available. If omitted, but opt_styles is specified, appends all of the style keys to the standard Google Maps API map types.

Returns: ui.Map

更改基本地图样式

我们可以从改变基础地图的风格开始。其中一个简单的方法是反转亮度以获得更暗的背景，就像这样： 

var baseChange = [{featureType: 'all', stylers: [{invert_lightness: true}]}];Map.setOptions('baseChange', {'baseChange': baseChange});

背景暗的情况

背景亮的情况 

主要的造型器选项包括

  • 色调（hue）：表示基本颜色
  • 亮度（lightness）：表示元素亮度变化的百分比
  • 饱和度（saturation）：表示元素基本颜色变化的百分比
  • 伽玛（gamma）：元素的伽玛校正（0.01 和 10.0）
  • invert_lightness：反转现有亮度
  • 可见度（visibility）：更改元素的可见度选项（开、关或简化）
  • color（color）：设置元素的颜色（使用 RGB 十六进制字符串）
  • 权重（weight）：以像素为单位设置特征的权重

更改地图元素

谷歌地图应用程序接口（以及延伸的地球引擎）可让您控制大量地图功能和元素。

您可以修改的元素的完整列表可以在谷歌地图文档中找到： https://developers.google.com/maps/documentation/javascript/style-reference

功能的完整列表（也可在上述链接的谷歌地图 API 文档中找到）包括几何图形、标签、图标等。所有造型器选项均可与这些功能配合使用。

例如，要移除图标并自定义路线图样式，可以按如下方式定义样式：

 自己更改代码

// Remove icons.
var iconChange = [{// Change map saturation.stylers: [{gamma: 0.2}]},{// Change label properties.elementType: 'labels',stylers: [{visibility: 'off', color: '#000055'}]},{// Change road properties.featureType: 'road',elementType: 'geometry',stylers: [{visibility: 'off', color: '#000055'}]},{// Change road labels.featureType: 'road',elementType: 'labels',stylers: [{visibility: 'off'}]},{// Change icon properties.elementType: 'labels.icon',stylers: [{visibility: 'off'}]},{// Change POI options.featureType: 'poi',elementType: 'all',stylers: [{visibility: 'off'}]},{featureType: 'administrative',elementType: 'geometry.fill',stylers: [{visibility: 'off'}]},{featureType: 'administrative',elementType: 'geometry.stroke',stylers: [{visibility: 'off'}]}
];// Enhanced road network visualization.
var roadNetwork = [{stylers: [{saturation: -100}]}, {featureType: 'road.highway',elementType: 'geometry.fill',stylers: [{color: '#000055'}, {weight: 2.5}]},{featureType: 'road.highway',elementType: 'geometry.stroke',stylers: [{color: '#000000'}, {weight: 2}]},{featureType: 'road.arterial',elementType: 'geometry',stylers: [{color: '#FF0000'}, {weight: 1.8}]},{featureType: 'road.local',elementType: 'geometry',stylers: [{color: '#00FF55'}, {weight: 1.5}]}
];Map.setOptions('roadNetwork', {iconChange: iconChange, roadNetwork: roadNetwork});

iconChange结果 

 

roadNetwork结果 

 

简化代码：引入格式

还有一种无需调整任何选项即可创建自定义基础地图样式的简便方法：进入 Snazzy Maps，这是一个创建和分享谷歌地图优秀样式的社区项目。他们的网站提供了 JavaScript 代码段，可以从网站上复制这些代码段并粘贴到 Earth Engine 中，从而快速创建备用的基础地图样式。

要应用 Snazzy Maps 样式，可以按以下步骤操作：

引用snazzy代码

var snazzyBlack = [{featureType: 'administrative',elementType: 'all',stylers: [{visibility: 'off'}]},{featureType: 'administrative',elementType: 'labels.text.fill',stylers: [{color: '#444444'}]},{featureType: 'landscape',elementType: 'all',stylers: [{color: '#000000'}, {visibility: 'on'}]},{featureType: 'poi', elementType: 'all', stylers: [{visibility: 'off'}]}, {featureType: 'road',elementType: 'all',stylers: [{saturation: -100}, {lightness: 45}]},{featureType: 'road',elementType: 'geometry.fill',stylers: [{color: '#ffffff'}]},{featureType: 'road',elementType: 'geometry.stroke',stylers: [{color: '#eaeaea'}]},{featureType: 'road', elementType: 'labels', stylers: [{visibility: 'off'}]},{featureType: 'road',elementType: 'labels.text.fill',stylers: [{color: '#dedede'}]},{featureType: 'road',elementType: 'labels.icon',stylers: [{visibility: 'off'}]},{featureType: 'road.highway',elementType: 'all',stylers: [{visibility: 'simplified'}]},{featureType: 'road.arterial',elementType: 'labels.icon',stylers: [{visibility: 'off'}]},{featureType: 'transit', elementType: 'all', stylers: [{visibility: 'off'}]},{featureType: 'water',elementType: 'all',stylers: [{color: '#434343'}, {visibility: 'on'}]}
];var snazzyColor = [{elementType: 'labels', stylers: [{visibility: 'off'}]}, {featureType: 'road',elementType: 'geometry.fill',stylers: [{color: '#0F0919'}]},{featureType: 'water',elementType: 'geometry.fill',stylers: [{color: '#E4F7F7'}]},{elementType: 'geometry.stroke', stylers: [{visibility: 'off'}]}, {featureType: 'poi.park',elementType: 'geometry.fill',stylers: [{color: '#002FA7'}]},{featureType: 'poi.attraction',elementType: 'geometry.fill',stylers: [{color: '#E60003'}]},{featureType: 'landscape',elementType: 'geometry.fill',stylers: [{color: '#FBFCF4'}]},{featureType: 'poi.business',elementType: 'geometry.fill',stylers: [{color: '#FFED00'}]},{featureType: 'poi.government',elementType: 'geometry.fill',stylers: [{color: '#D41C1D'}]},{featureType: 'poi.school',elementType: 'geometry.fill',stylers: [{color: '#BF0000'}]},{featureType: 'transit.line',elementType: 'geometry.fill',stylers: [{saturation: -100}]}
];Map.setOptions('snazzyBlack', {snazzyBlack: snazzyBlack, snazzyColor: snazzyColor});

 snazzyBlack

 snazzyColor 

最后，在为基础地图创建自定义样式时，还可以使用 mapstyle 获得视觉反馈。创建一张地图，复制 JavaScript 代码段并粘贴到 Google 地球引擎 JavaScript 编辑器中。下面的样式就是使用 mapstyle 向导创建的。

免费引用JavaScript Map底图样式链接：

Snazzy Maps - Free Styles for Google Maps

Midnight Commander底图加载代码

var xxx=[{"featureType": "all","elementType": "labels.text.fill","stylers": [{"color": "#ffffff"}]},{"featureType": "all","elementType": "labels.text.stroke","stylers": [{"color": "#000000"},{"lightness": 13}]},{"featureType": "administrative","elementType": "geometry.fill","stylers": [{"color": "#000000"}]},{"featureType": "administrative","elementType": "geometry.stroke","stylers": [{"color": "#144b53"},{"lightness": 14},{"weight": 1.4}]},{"featureType": "landscape","elementType": "all","stylers": [{"color": "#08304b"}]},{"featureType": "poi","elementType": "geometry","stylers": [{"color": "#0c4152"},{"lightness": 5}]},{"featureType": "road.highway","elementType": "geometry.fill","stylers": [{"color": "#000000"}]},{"featureType": "road.highway","elementType": "geometry.stroke","stylers": [{"color": "#0b434f"},{"lightness": 25}]},{"featureType": "road.arterial","elementType": "geometry.fill","stylers": [{"color": "#000000"}]},{"featureType": "road.arterial","elementType": "geometry.stroke","stylers": [{"color": "#0b3d51"},{"lightness": 16}]},{"featureType": "road.local","elementType": "geometry","stylers": [{"color": "#000000"}]},{"featureType": "transit","elementType": "all","stylers": [{"color": "#146474"}]},{"featureType": "water","elementType": "all","stylers": [{"color": "#021019"}]}
]
//Midnight Commander
Map.setOptions('xxx', {xxx: xxx, snazzyColor: snazzyColor});

结果

多有代码


// hue: indicates the basic color
// lightness: indicates percentage change in brightness of an element
// saturation: indicates percentage change in basic color of an element
// gamma: gamma correction of an element (0.01 and 10.0)
// invert_lightness: inverts the existing lightness
// visibility: changes visibility options for an element (on, off, or simplified)
// color: sets the color of an element (using RGB Hex Strings)
// weight: sets the weight of a feature in pixelsvar baseChange = [{featureType: 'all', 
stylers: [{invert_lightness: true,color:'#001155',weight:0.7,hue:'red', lightness:0.6, saturation:0.5, gamma:1.5,visibility:'off'}]}];Map.setOptions('baseChange', {'baseChange': baseChange});// Remove icons.
var iconChange = [{// Change map saturation.stylers: [{gamma: 0.2}]},{// Change label properties.elementType: 'labels',stylers: [{visibility: 'off', color: '#000055'}]},{// Change road properties.featureType: 'road',elementType: 'geometry',stylers: [{visibility: 'off', color: '#000055'}]},{// Change road labels.featureType: 'road',elementType: 'labels',stylers: [{visibility: 'off'}]},{// Change icon properties.elementType: 'labels.icon',stylers: [{visibility: 'off'}]},{// Change POI options.featureType: 'poi',elementType: 'all',stylers: [{visibility: 'off'}]},{featureType: 'administrative',elementType: 'geometry.fill',stylers: [{visibility: 'off'}]},{featureType: 'administrative',elementType: 'geometry.stroke',stylers: [{visibility: 'off'}]}
];// Enhanced road network visualization.
var roadNetwork = [{stylers: [{saturation: -100}]}, {featureType: 'road.highway',elementType: 'geometry.fill',stylers: [{color: '#000055'}, {weight: 2.5}]},{featureType: 'road.highway',elementType: 'geometry.stroke',stylers: [{color: '#000000'}, {weight: 2}]},{featureType: 'road.arterial',elementType: 'geometry',stylers: [{color: '#FF0000'}, {weight: 1.8}]},{featureType: 'road.local',elementType: 'geometry',stylers: [{color: '#00FF55'}, {weight: 1.5}]}
];Map.setOptions('roadNetwork', {iconChange: iconChange, roadNetwork: roadNetwork});var snazzyBlack = [{featureType: 'administrative',elementType: 'all',stylers: [{visibility: 'off'}]},{featureType: 'administrative',elementType: 'labels.text.fill',stylers: [{color: '#444444'}]},{featureType: 'landscape',elementType: 'all',stylers: [{color: '#000000'}, {visibility: 'on'}]},{featureType: 'poi', elementType: 'all', stylers: [{visibility: 'off'}]}, {featureType: 'road',elementType: 'all',stylers: [{saturation: -100}, {lightness: 45}]},{featureType: 'road',elementType: 'geometry.fill',stylers: [{color: '#ffffff'}]},{featureType: 'road',elementType: 'geometry.stroke',stylers: [{color: '#eaeaea'}]},{featureType: 'road', elementType: 'labels', stylers: [{visibility: 'off'}]},{featureType: 'road',elementType: 'labels.text.fill',stylers: [{color: '#dedede'}]},{featureType: 'road',elementType: 'labels.icon',stylers: [{visibility: 'off'}]},{featureType: 'road.highway',elementType: 'all',stylers: [{visibility: 'simplified'}]},{featureType: 'road.arterial',elementType: 'labels.icon',stylers: [{visibility: 'off'}]},{featureType: 'transit', elementType: 'all', stylers: [{visibility: 'off'}]},{featureType: 'water',elementType: 'all',stylers: [{color: '#434343'}, {visibility: 'on'}]}
];var snazzyColor = [{elementType: 'labels', stylers: [{visibility: 'off'}]}, {featureType: 'road',elementType: 'geometry.fill',stylers: [{color: '#0F0919'}]},{featureType: 'water',elementType: 'geometry.fill',stylers: [{color: '#E4F7F7'}]},{elementType: 'geometry.stroke', stylers: [{visibility: 'off'}]}, {featureType: 'poi.park',elementType: 'geometry.fill',stylers: [{color: '#002FA7'}]},{featureType: 'poi.attraction',elementType: 'geometry.fill',stylers: [{color: '#E60003'}]},{featureType: 'landscape',elementType: 'geometry.fill',stylers: [{color: '#FBFCF4'}]},{featureType: 'poi.business',elementType: 'geometry.fill',stylers: [{color: '#FFED00'}]},{featureType: 'poi.government',elementType: 'geometry.fill',stylers: [{color: '#D41C1D'}]},{featureType: 'poi.school',elementType: 'geometry.fill',stylers: [{color: '#BF0000'}]},{featureType: 'transit.line',elementType: 'geometry.fill',stylers: [{saturation: -100}]}
];Map.setOptions('snazzyBlack', {snazzyBlack: snazzyBlack, snazzyColor: snazzyColor});var xxx=[{"featureType": "all","elementType": "labels.text.fill","stylers": [{"color": "#ffffff"}]},{"featureType": "all","elementType": "labels.text.stroke","stylers": [{"color": "#000000"},{"lightness": 13}]},{"featureType": "administrative","elementType": "geometry.fill","stylers": [{"color": "#000000"}]},{"featureType": "administrative","elementType": "geometry.stroke","stylers": [{"color": "#144b53"},{"lightness": 14},{"weight": 1.4}]},{"featureType": "landscape","elementType": "all","stylers": [{"color": "#08304b"}]},{"featureType": "poi","elementType": "geometry","stylers": [{"color": "#0c4152"},{"lightness": 5}]},{"featureType": "road.highway","elementType": "geometry.fill","stylers": [{"color": "#000000"}]},{"featureType": "road.highway","elementType": "geometry.stroke","stylers": [{"color": "#0b434f"},{"lightness": 25}]},{"featureType": "road.arterial","elementType": "geometry.fill","stylers": [{"color": "#000000"}]},{"featureType": "road.arterial","elementType": "geometry.stroke","stylers": [{"color": "#0b3d51"},{"lightness": 16}]},{"featureType": "road.local","elementType": "geometry","stylers": [{"color": "#000000"}]},{"featureType": "transit","elementType": "all","stylers": [{"color": "#146474"}]},{"featureType": "water","elementType": "all","stylers": [{"color": "#021019"}]}
]
//Midnight Commander
Map.setOptions('xxx', {xxx: xxx, snazzyColor: snazzyColor});

 

这篇关于GEE 底图加载——自定义底图样式加载案例分析（含免费引如多款底图）的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

原文地址:
本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：http://www.chinasem.cn/article/788418。

相关文章

PostgreSQL的扩展dict_int应用案例解析

PostgreSQL的扩展dict_int应用案例解析

《PostgreSQL的扩展dict_int应用案例解析》dict_int扩展为PostgreSQL提供了专业的整数文本处理能力,特别适合需要精确处理数字内容的搜索场景,本文给大家介绍PostgreS... 目录PostgreSQL的扩展dict_int一、扩展概述二、核心功能三、安装与启用四、字典配置方法
阅读更多...
怎样通过分析GC日志来定位Java进程的内存问题

怎样通过分析GC日志来定位Java进程的内存问题

《怎样通过分析GC日志来定位Java进程的内存问题》：本文主要介绍怎样通过分析GC日志来定位Java进程的内存问题,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教... 目录一、GC 日志基础配置1. 启用详细 GC 日志2. 不同收集器的日志格式二、关键指标与分析维度1.
阅读更多...
Python中re模块结合正则表达式的实际应用案例

Python中re模块结合正则表达式的实际应用案例

《Python中re模块结合正则表达式的实际应用案例》Python中的re模块是用于处理正则表达式的强大工具,正则表达式是一种用来匹配字符串的模式,它可以在文本中搜索和匹配特定的字符串模式,这篇文章主... 目录前言re模块常用函数一、查看文本中是否包含 A 或 B 字符串二、替换多个关键词为统一格式三、提
阅读更多...
MySQL中的表连接原理分析

MySQL中的表连接原理分析

《MySQL中的表连接原理分析》：本文主要介绍MySQL中的表连接原理分析,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教... 目录1、背景2、环境3、表连接原理【1】驱动表和被驱动表【2】内连接【3】外连接【4编程】嵌套循环连接【5】join buffer4、总结1、背景
阅读更多...
Python get()函数用法案例详解

Python get()函数用法案例详解

《Pythonget()函数用法案例详解》在Python中,get()是字典（dict）类型的内置方法,用于安全地获取字典中指定键对应的值,它的核心作用是避免因访问不存在的键而引发KeyError错... 目录简介基本语法一、用法二、案例：安全访问未知键三、案例：配置参数默认值简介python是一种高级编
阅读更多...
python中Hash使用场景分析

python中Hash使用场景分析

《python中Hash使用场景分析》Python的hash()函数用于获取对象哈希值,常用于字典和集合,不可变类型可哈希,可变类型不可,常见算法包括除法、乘法、平方取中和随机数哈希,各有优缺点,需根... 目录python中的 Hash除法哈希算法乘法哈希算法平方取中法随机数哈希算法小结在Python中，
阅读更多...
MySQL中的索引结构和分类实战案例详解

MySQL中的索引结构和分类实战案例详解

《MySQL中的索引结构和分类实战案例详解》本文详解MySQL索引结构与分类,涵盖B树、B+树、哈希及全文索引,分析其原理与优劣势,并结合实战案例探讨创建、管理及优化技巧,助力提升查询性能,感兴趣的朋... 目录一、索引概述1.1 索引的定义与作用1.2 索引的基本原理二、索引结构详解2.1 B树索引2.2
阅读更多...
Java实现自定义table宽高的示例代码

Java实现自定义table宽高的示例代码

《Java实现自定义table宽高的示例代码》在桌面应用、管理系统乃至报表工具中,表格（JTable）作为最常用的数据展示组件,不仅承载对数据的增删改查,还需要配合布局与视觉需求,而JavaSwing... 目录一、项目背景详细介绍二、项目需求详细介绍三、相关技术详细介绍四、实现思路详细介绍五、完整实现代码
阅读更多...
一文详解Java Stream的sorted自定义排序

一文详解Java Stream的sorted自定义排序

《一文详解JavaStream的sorted自定义排序》Javastream中的sorted方法是用于对流中的元素进行排序的方法,它可以接受一个comparator参数,用于指定排序规则,sorte... 目录一、sorted 操作的基础原理二、自定义排序的实现方式1. Comparator 接口的 Lam
阅读更多...
Java Stream的distinct去重原理分析

Java Stream的distinct去重原理分析

《JavaStream的distinct去重原理分析》Javastream中的distinct方法用于去除流中的重复元素,它返回一个包含过滤后唯一元素的新流,该方法会根据元素的hashcode和eq... 目录一、distinct 的基础用法与核心特性二、distinct 的底层实现原理1. 顺序流中的去重
阅读更多...

Copyright China编程 23002807@qq.com

沪ICP备2023033072号-2