各向异性
- 具有方向依赖性
crs
- 坐标参考系统。由相关机构(例如 EPSG 或 SR-ORG)定义的坐标系,指定为字符串,其中机构和代码之间用英文冒号分隔,例如
'EPSG:4326'
。 crs_transform
crs
的后转换,定义为按行优先顺序排列的仿射转换参数列表 [xScale, xShearing, xTranslation, yShearing, yScale, yTranslation]。如需了解详情,请参阅此参考文档。DEM
- 数字高程模型
DN
- 数字
DOY
- 一年中的第几天
公司
- 资源管理系统火灾信息
google:registration_count
- 一种图像元数据属性,用于表示发现的在位置上与已知已准确配准的参考图像一致的点数。大于 1000 的数字表示匹配度良好。
google:registration_offset_*
- 图像与已知已准确注册的参考图像之间的测量偏移量(以米为单位)。
各向同性
- 与方向无关
MODIS
- 中等分辨率成像光谱辐射计
NIR
- 近红外线
NDVI
- 归一化差值植被指数。(NIR - red) / (NIR + red)
NDWI
- 归一化差值水指数。(绿色 - 近红外)/(绿色 + 近红外)
悲伤
- Sistema de Alerta de Desmatamento
标清
- 标准差
system:time_start
- 自 UNIX 纪元以来的 Earth Engine 时间戳(以毫秒为单位)。如需了解详情,请参阅此链接。 时间戳设置为单场景的名义影像采集时间。它设置为时间序列复合的标称复合开始周期。
system:time_end
- 请参阅 system:time_start。结束时间戳设置为单场景的标称影像采集时间。对于 MODIS 时间序列合成,该值设置为名义合成结束期后一天的午夜。
USGS
- 美国地质调查局
WRI
- 世界资源研究所
术语库
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-26。
[null,null,["最后更新时间 (UTC):2025-07-26。"],[[["\u003cp\u003eThis glossary defines common terms and acronyms (like NDVI, DEM, and MODIS) encountered in Earth Engine.\u003c/p\u003e\n"],["\u003cp\u003eIt explains technical metadata properties such as \u003ccode\u003ecrs\u003c/code\u003e, \u003ccode\u003ecrs_transform\u003c/code\u003e, and \u003ccode\u003esystem:time_start\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eIt includes links to external resources for further information on certain topics like FIRMS and SAD.\u003c/p\u003e\n"],["\u003cp\u003eThe glossary covers concepts related to image properties (isotropic, anisotropic) and data quality (registration).\u003c/p\u003e\n"]]],[],null,["# Glossary\n\n### Anisotropic\n\n: Directionally dependent\n\n### `crs`\n\n: Coordinate Reference System. A coordinate system, as defined by a relevant authority\n such as [EPSG](http://epsg.io/) or\n [SR-ORG](http://spatialreference.org/), specified as a string with the\n authority and the code separated by a colon, for example `'EPSG:4326'`.\n\n### `crs_transform`\n\n: A post transform for a `crs`, defined as a\n list of affine transformation parameters in row-major order \\[xScale, xShearing,\n xTranslation, yShearing, yScale, yTranslation\\]. See\n [this\n reference](https://docs.oracle.com/javase/8/docs/api/java/awt/geom/AffineTransform.html) for more information.\n\n### DEM\n\n: Digital Elevation Model\n\n### DN\n\n: Digital Number\n\n### DOY\n\n: Day Of Year\n\n### FIRMS\n\n: [Fire\n Information for Resource Management System](https://earthdata.nasa.gov/earth-observation-data/near-real-time/firms)\n\n### google:registration_count\n\n: An image metadata property for the number of points found to be positionally consistent\n with a reference image known to be accurately registered. Numbers greater than 1000\n indicate a good match.\n\n### google:registration_offset_\\*\n\n: The measured offset, in meters, between the image and a reference image known to be\n accurately registered.\n\n### Isotropic\n\n: Independent of direction\n\n### MODIS\n\n: [MODerate resolution Imaging Spectro-radiometer](http://modis.gsfc.nasa.gov/)\n\n### NIR\n\n: Near Infra-Red\n\n### NDVI\n\n: Normalized Difference Vegetation Index. (NIR - red) / (NIR + red)\n\n### NDWI\n\n: Normalized Difference Water Index. (green - NIR) / (green + NIR)\n\n### SAD\n\n: [Sistema\n de Alerta de Desmatamento](http://imazon.org.br/imprensa/sistema-de-alerta-de-desmatamento-sad-operacional-na-plataforma-google-earth-engine/)\n\n### SD\n\n: Standard Deviation\n\n### `system:time_start`\n\n: The Earth Engine time stamp in milliseconds since the UNIX epoch. See\n [this link](https://en.wikipedia.org/wiki/Unix_time) for more information.\n The time stamp is set to the nominal image acquisition time for single scenes. It is set\n to the nominal composite start period for temporal composites.\n\n### `system:time_end`\n\n: See system:time_start. The ending time stamp is set to the nominal image acquisition\n time for single scenes. It is set to midnight on the day after the nominal composite\n end period for MODIS temporal composites.\n\n### USGS\n\n: [United States Geological Survey](http://www.usgs.gov/)\n\n### WRI\n\n: [World Resources Institute](http://www.wri.org/)"]]