> For the complete documentation index, see [llms.txt](https://isbm.savimbo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://isbm.savimbo.com/methodology/zh-cn/fu-lu/fu-lugkai-yuan-dai-ma-he-ji-suan-yang-ben.md).

# 附录G：开源代码和计算样本

用于生物多样性信用计算的开源代码可供公众在以下位置获取： [Savimbo GitHub](https://github.com/savimbo). 

我们有意使该代码更易于使用，并在 2024 年开始生物多样性认证后，通过一个接口向 IP 和 LC 项目提供自动生成信用、并可对接免费的 Airtable 数据库。免费 Airtable [注册 ](https://airtable.com/invite/r/fxsn6mcE)现已开放。IP 项目现在可通过该界面注册候补名单，并发送电子邮件至 <ops@savimbo.com> 获取 Airtable 数据库模板

演示计算亦可获得。Google Earth Engine 已承诺向参与气候变化的原住民群体提供免费账户。非商业用途 [注册](https://earthengine.google.com/noncommercial/) 可用。&#x20;

**图11。Google Earth Engine 代码示例**&#x20;

<figure><img src="https://lh6.googleusercontent.com/rVQ0Wv_v9_eXa7qOghqAvJhwResowct17qRiUSD-lO_eatzZqyiNhfpKmprKNcRWdVXXkv2FuYyAetkdA1BzOcf6d7EWeGqmRpKVVMGmk89gLOQd8i1K-Ia4A7ixXu0Xo2XSlovBPF8KPN24COHu6a4" alt=""><figcaption><p><em><strong>图11</strong></em>. Google Earth Engine 代码示例</p></figcaption></figure>

代码示例，代码正在外部修订中。可通过 Google Earth Engine 在此 [链接访问。](https://code.earthengine.google.com/e914e4bf1b4fd252f4ad90318ca2371e) 或在 Savimbo GitHub 在此 [链接访问。](https://github.com/savimbo) 联系 ***ops at savimbo.co**m* 如您希望成为代码审阅人。&#x20;

```markup
// 加载 plot18 多边形
var plot18_data = require("users/drea/map:plot18_data");
var plot18 = plot18_data.polygon;

// 以公顷为单位计算样地面积
var plotArea = plot18.area();
var plotAreaHectares = plotArea.divide(10000);

// 加载美洲豹点位
var points_jaguar_data = require("users/drea/map:points_jaguar_data");
var puntos = points_jaguar_data.points;
var radios = [];
var sumMultipliedArea = ee.Number(0);

// 定义用于存储交集多边形的要素集合
var intersectionPolygons = ee.FeatureCollection([]);

// 定义 assignedArea 函数
var assignedAreaFunction = function(offset) {
  var day = startDate.advance(offset, 'day');
  var dayString = day.format('YYYY-MM-dd');
  var feature = ee.Feature(null, { date: dayString, intersectionArea: intersectionArea });
  return feature.set('date_area', ee.String(dayString).cat(' - ').cat(intersectionArea));
};

// 计算每个点的半径和缓冲区
for (var i = 0; i < puntos.length; i++) {
  var point = puntos[i].geometry;
  var date = puntos[i].date;

  // 通过减去 30 天计算开始日期
  var startDate = ee.Date(date).advance(-30, 'day');
  
  // 通过增加 30 天计算结束日期
  var endDate = ee.Date(date).advance(30, 'day');
  
  // 创建一个以点几何和日期为属性的要素
  var feature = ee.Feature(point, { date: date });
  
  var pointBuffer = feature.buffer(800);
  radios.push(pointBuffer);
  
  // 计算与 plot18 的交集
  var intersection = pointBuffer.intersection(plot18);
  
  // 计算面积，以公顷为单位
  var area = intersection.area().divide(10000);
  
  // 获取日期的月份和年份
  var month = ee.Date(date).get('month');
  var year = ee.Date(date).get('year');
  
  // 生成月份和年份标签
  var monthYearLabel = ee.String(month).cat('-').cat(year).cat(' 公顷 N°');
  
  // 计算当前点与 plot18 的交集
  var intersectionPlot18 = pointBuffer.intersection(plot18);
  
  // 计算与 plot18 交集的面积，以公顷为单位
  var intersectionArea = intersectionPlot18.area().divide(10000);
  var multipliedArea = intersectionArea.multiply(60);
  
  // 将 multipliedArea 加到总和中
  sumMultipliedArea = sumMultipliedArea.add(multipliedArea);
  
  // 定义美洲豹活动范围的日期区间
  var jaguarRange = endDate.difference(startDate, 'day');
  
 // 将 intersectionArea 值分配给美洲豹范围内的每一天
  var assignedArea = ee.FeatureCollection(ee.List.sequence(0, jaguarRange.subtract(1)).map(assignedAreaFunction));
  
  // 打印每个点的结果
  print('美洲豹：', i + 1);
  print('图像获取日期：', date);
  print('开始日期：', startDate.format('YYYY-MM-dd'));
  print('结束日期：', endDate.format('YYYY-MM-dd'));
  print('每日总交集面积（公顷）：', intersectionArea);
  print('交集面积 × 60：', multipliedArea);
  print('每日分配面积：', assignedArea);
  print('----------------------');
  
  // 以蓝色将当前点缓冲区添加到地图
  Map.addLayer(pointBuffer, { color: 'blue' }, '半径 ' + (i + 1));
  
  // 将交集几何添加到 intersectionPolygons
  intersectionPolygons = intersectionPolygons.merge(intersection);
}

// 执行多边形并集以避免重复
var unionPolygons = intersectionPolygons.union();

// 计算去重后的交集总面积
var totalIntersectionArea = unionPolygons.geometry().area().divide(10000);

// 显示结果
print('总交集面积（公顷）：', totalIntersectionArea);
print('plot18 面积（公顷）：', plotAreaHectares);
print('交集面积乘以 60 天的总和（公顷）：', sumMultipliedArea);

// 将 plot18 图层添加到地图
Map.addLayer(plot18, { color: 'gold' }, "plot18");
Map.centerObject(plot18);

```


---

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