制作图表

数据集标题:	Diffuse Attenuation Coef. K490, Aqua MODIS, NPP, 0.0125°, West US, 2002- present (14 Day Composite), Lon+/-180
机构:	NOAA NMFS SWFSC ERD (数据集 ID: erdMWk49014day_LonPM180)
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 →

altitude (m)

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 1.0260864e+9, 1.7457984e+9;
    String axis "T";
    Int32 fraction_digits 0;
    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";
  }
  altitude {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    Int32 fraction_digits 0;
    String ioos_category "Location";
    String long_name "Altitude";
    String positive "up";
    String standard_name "altitude";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 22.0, 51.0;
    String axis "Y";
    String coordsys "geographic";
    Int32 fraction_digits 4;
    String ioos_category "Location";
    String long_name "Latitude";
    String point_spacing "even";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -155.0, -105.0;
    String axis "X";
    String coordsys "geographic";
    Int32 fraction_digits 4;
    String ioos_category "Location";
    String long_name "Longitude";
    String point_spacing "even";
    String standard_name "longitude";
    String units "degrees_east";
  }
  k490 {
    Float32 _FillValue -9999999.0;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum 0.0;
    String coordsys "geographic";
    Int32 fraction_digits 3;
    String ioos_category "Optical Properties";
    String long_name "Diffuse Attenuation Coefficient K490";
    Float32 missing_value -9999999.0;
    String units "m-1";
  }
  NC_GLOBAL {
    String acknowledgement "NOAA NESDIS COASTWATCH, NOAA SWFSC ERD";
    String cdm_data_type "Grid";
    String composite "true";
    String contributor_name "NASA, NASA GSFC OBPG";
    String contributor_role "Source of level 2 data.";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "erd.data@noaa.gov";
    String creator_name "NOAA NMFS SWFSC ERD";
    String creator_type "institution";
    String creator_url "https://www.pfeg.noaa.gov";
    String date_created "2025-05-05";
    String date_issued "2025-05-05";
    Float64 Easternmost_Easting -105.0;
    String files "MW2025111_2025111_k490.nc, MW2025112_2025112_k490.nc, MW2025113_2025113_k490.nc, MW2025114_2025114_k490.nc, MW2025115_2025115_k490.nc, MW2025116_2025116_k490.nc, MW2025117_2025117_k490.nc, MW2025118_2025118_k490.nc, MW2025119_2025119_k490.nc, MW2025120_2025120_k490.nc, MW2025121_2025121_k490.nc, MW2025122_2025122_k490.nc, MW2025123_2025123_k490.nc, MW2025124_2025124_k490.nc";
    Float64 geospatial_lat_max 51.0;
    Float64 geospatial_lat_min 22.0;
    Float64 geospatial_lat_resolution 0.0125;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -105.0;
    Float64 geospatial_lon_min -155.0;
    Float64 geospatial_lon_resolution 0.0125;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 0.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "up";
    String geospatial_vertical_units "m";
    String history 
"2025-05-05T21:50:09Z (local files)
2025-05-05T21:50:09Z https://coastwatch.pfeg.noaa.gov/griddap/erdMWk49014day_LonPM180.das";
    String infoUrl "https://coastwatch.pfeg.noaa.gov/infog/MW_k490_las.html";
    String institution "NOAA NMFS SWFSC ERD";
    String keywords "altitude, aqua, attenuation, coast, coastwatch, coefficient, color, data, degrees, diffuse, Earth Science > Oceans > Ocean Optics > Attenuation/Transmission, imaging, k490, moderate, modis, MWk490, national, noaa, node, npp, ocean, ocean color, oceans, optics, orbiting, partnership, polar, polar-orbiting, resolution, spectroradiometer, time, transmission, US, wcn, west";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"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 naming_authority "gov.noaa.pfeg.coastwatch";
    Float64 Northernmost_Northing 51.0;
    String origin "NASA, NASA GSFC OBPG";
    String processing_level "3";
    String project "CoastWatch (https://coastwatch.noaa.gov/)";
    String projection "geographic";
    String projection_type "mapped";
    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 references "Aqua/MODIS information: https://oceancolor.gsfc.nasa.gov/data/aqua/ . MODIS information: https://coastwatch.noaa.gov/cw_html/OceanColor_NRT_MODIS_Aqua.html .";
    String satellite "Aqua";
    String sensor "MODIS";
    String source "satellite observation: Aqua, MODIS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 22.0;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "NASA distributes Diffuse Attenuation Coefficient at 490 nm Wavelength data from NASA's Aqua satellite.  Measurements are gathered by the Moderate Resolution Imaging Spectroradiometer (MODIS) carried aboard the spacecraft.";
    String testOutOfDate "now-10days";
    String time_coverage_end "2025-04-28T00:00:00Z";
    String time_coverage_start "2002-07-08T00:00:00Z";
    String title "Diffuse Attenuation Coef. K490, Aqua MODIS, NPP, 0.0125°, West US, 2002-present (14 Day Composite), Lon+/-180";
    Float64 Westernmost_Easting -155.0;
  }
}

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.