制作图表

数据集标题:	MODIS Aqua, Level-3 SMI, Global, 4km, Particulate Organic Carbon, 2003- present (8 Day Composite), Lon0360
机构:	NASA/GSFC OBPG (数据集 ID: erdMPOC8day_Lon0360)
信息:	概括 \| 执照 \| FGDC \| ISO 19115 \| 元数据 \| 背景 \| 数据访问表 \| 文件

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图表类型:
X 轴:
Y 轴:
颜色:

方面

开始

Stop

time (UTC)

仅指定 1 个值 →

latitude (degrees_north)

longitude (degrees_east)

图表设置
彩条:	连续性:	规模:
最低限度:	最大限度:	N 节:
绘制陆地遮罩:
Y 轴最小值:	最大限度:

（请耐心等待，获取数据可能需要一段时间。）

选修的:
然后设置文件类型: (文件类型信息)
and

或查看 URL:
(文档 / 旁路这形式

)

单击地图以指定新的中心点。

飞涨:

您可以使用图表来做的事情

当然，你可以对图表做任何你想做的事情。但你可能没有考虑到以下几点：

网页作者可以使用 HTML <img> 标签在网页中嵌入最新数据的图表。
任何人都可以使用ERDDAP的幻灯片分类器来构建个人网页，该网页以自己的可拖动幻灯片形式显示包含最新数据（或其他图像或 HTML 内容）的图表。

此数据集的数据集属性结构 (.das)

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.0417248e+9, 1.6551648e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Centered Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 _FillValue NaN;
    Float32 actual_range -89.97917, 89.97916;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 90.0;
    Float32 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 _FillValue NaN;
    Float32 actual_range 0.0208387, 359.9792;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  poc {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 1000.0;
    Float64 colorBarMinimum 10.0;
    String colorBarScale "Log";
    String ioos_category "Ocean Color";
    String long_name "Particulate Organic Carbon, D. Stramski, 2007 (443/555 version)";
    String references "Stramski, D., et al. \"Relationships between the surface concentration of particulate organic carbon and optical properties in the eastern South Pacific and eastern Atlantic Oceans.\" Biogeosciences 5.1 (2008): 171-201.";
    String units "mg m-3";
    Float32 valid_max 1000.0;
    Float32 valid_min 0.0;
  }
  NC_GLOBAL {
    String _lastModified "2022-07-05T03:56:33.000Z";
    String _NCProperties "version=2,netcdf=4.7.3,hdf5=1.12.0,";
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "data@oceancolor.gsfc.nasa.gov";
    String creator_name "NASA/GSFC/OBPG";
    String creator_type "group";
    String creator_url "https://oceandata.sci.gsfc.nasa.gov";
    String date_created "2022-07-05T03:56:33.000Z";
    Float64 Easternmost_Easting 359.9792;
    Float64 geospatial_lat_max 89.97916;
    Float64 geospatial_lat_min -89.97917;
    Float64 geospatial_lat_resolution 0.04166666589488307;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 359.9792;
    Float64 geospatial_lon_min 0.0208387;
    Float64 geospatial_lon_resolution 0.041666669903924064;
    String geospatial_lon_units "degrees_east";
    String history 
"Datafiles are downloaded ASAP from https://oceandata.sci.gsfc.nasa.gov/MODIS-Aqua/L3SMI to NOAA NMFS SWFSC ERD.
NOAA NMFS SWFSC ERD (erd.data@noaa.gov) uses ERDDAP to add the time variable and slightly modify the metadata.
Direct read of HDF4 file through CDM library.
2025-05-05T10:23:25Z (local files)
2025-05-05T10:23:25Z https://coastwatch.pfeg.noaa.gov/griddap/erdMPOC8day_Lon0360.das";
    String identifier_product_doi "10.5067/AQUA/MODIS/L3M/POC/2018";
    String identifier_product_doi_authority "https://dx.doi.org";
    String infoUrl "https://coastwatch.pfeg.noaa.gov/infog/MPOC_las.html";
    String institution "NASA/GSFC OBPG";
    String instrument "MODIS";
    String keywords "443/555, biology, carbon, center, chemistry, chlorophyll, color, concentration, data, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Optics > Ocean Color, ecology, flight, goddard, group, gsfc, image, imaging, L3, laboratory, level, level-3, mapped, moderate, modis, mole, mole_concentration_of_particulate_organic_carbon_in_sea_water, nasa, ocean, ocean color, oceans, optics, organic, particulate, poc, processing, resolution, sea, seawater, smi, space, spectroradiometer, standard, stramski, time, version, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String l2_flag_names "ATMFAIL,LAND,HILT,HISATZEN,STRAYLIGHT,CLDICE,COCCOLITH,LOWLW,CHLWARN,CHLFAIL,NAVWARN,MAXAERITER,ATMWARN,HISOLZEN,NAVFAIL,FILTER,HIGLINT";
    String license 
"https://science.nasa.gov/earth-science/earth-science-data/data-information-policy/
The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
    String map_projection "Equidistant Cylindrical";
    String measure "Mean";
    String naming_authority "gov.noaa.pfeg.coastwatch";
    Float64 Northernmost_Northing 89.97916;
    String platform "Aqua";
    String processing_level "L3 Mapped";
    String processing_version "2018.1QL";
    String project "Ocean Biology Processing Group (NASA/GSFC/OBPG)";
    String publisher_email "erd.data@noaa.gov";
    String publisher_name "NOAA NMFS SWFSC ERD";
    String publisher_type "institution";
    String publisher_url "https://www.pfeg.noaa.gov";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.97917;
    String spatialResolution "4.64 km";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "MODIS Aqua, Level-3 Standard Mapped Image (SMI), Global, 4km, Particulate Organic Carbon (POC) (8 Day Composite)";
    String temporal_range "8-day";
    String testOutOfDate "now-30days";
    String time_coverage_end "2022-06-14T00:00:00Z";
    String time_coverage_start "2003-01-05T00:00:00Z";
    String title "MODIS Aqua, Level-3 SMI, Global, 4km, Particulate Organic Carbon, 2003-present (8 Day Composite), Lon0360";
    Float64 Westernmost_Easting 0.0208387;
  }
}

使用 griddap 从网格数据集请求数据和图表

griddap允许您通过特殊格式的 URL 从网格数据集中请求数据子集、图表或地图（例如，来自卫星的海面温度数据）。griddap 使用OPeNDAP (external link)

数据访问协议 (DAP ) (external link)

及其投影约束

。

URL 指定您想要的内容：数据集、图表或数据子集的描述以及响应的文件类型。

（简单）您可以使用数据集的数据访问表单获取数据。它会为您生成 URL。
（简单）您可以使用数据集的“制作图表”表单制作图表或地图。它会为您生成 URL。
（不难）您可以绕过表格并获取数据，或者通过手动生成 URL 或使用计算机程序或脚本来制作图形或地图。

griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.