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Dataset Title:  ALOHA Cabled Observatory (ACO): Hydrophone Acoustics Subscribe RSS
Institution:  University of Hawaii   (Dataset ID: aco_acoustic_agg)
Information:  Summary ? | License ? | Metadata | Background (external link) | Data Access Form | Files
Graph Type:  ?
X Axis:  ?
Y Axis:  ?
Dimensions ?    Start ?    Stop ?
time (UTC) ?     specify just 1 value →
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elapsedTime (seconds) ?
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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4163561e+9, 1.4163564e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  elapsedTime {
    Float64 actual_range 0.0, 299.99998958333333;
    String long_name "Elapsed Time";
    String units "seconds";
  channel_1 {
    Float64 colorBarMaximum 33000.0;
    Float64 colorBarMinimum -33000.0;
    String long_name "Channel 1";
    String audioBigEndian "false";
    Int32 audioChannels 1;
    String audioEncoding "PCM_SIGNED";
    Float32 audioFrameRate 96000.0;
    Int32 audioFrameSize 2;
    Float32 audioSampleRate 96000.0;
    Int32 audioSampleSizeInBits 16;
    String cdm_data_type "Grid";
    String contributor_name "Jim Potemra";
    String contributor_role "distributor";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_name "University of Hawaii";
    String creator_url "";
    String date_created "2018-02-13";
    String date_issued "2018-02-13";
    String date_modified "2018-02-13";
    String defaultDataQuery "&time=min(time)";
    String defaultGraphQuery "channel_1[0][(0):(1)]&.draw=lines&.vars=elapsedTime|time";
    String geospatial_bounds "POINT Z (22.7387 -158.0062 4707.5)";
    String geospatial_bounds_crs "EPSG:4326";
    String geospatial_bounds_vertical_crs "EPSG:5831";
    String history 
"PacIOOS serves and aggregates via ERDDAP (02/2018)
    String infoUrl "";
    String institution "University of Hawaii";
    String keywords "Earth Science > Oceans > Ocean Acoustics";
    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 "org.pacioos";
    String processing_level "near real-time (nrt)";
    String project "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_email "";
    String publisher_name "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_url "";
    String source "hydrophone";
    String sourceUrl "";
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary 
"The University of Hawaii's ALOHA (\"A Long-term Oligotrophic Habitat Assessment\") Cabled Observatory (ACO) is located 100 km north of the island of Oahu, Hawaii (22 45'N, 158W) in the North Pacific Ocean. It provides real-time oceanographi
c observations from a depth of about 4,800 m via a submarine fiber optic cable that comes ashore at Makaha on Oahu. This data set provides sound files of ocean acoustics at the ocean floor from the ACO hydrophone.";
    String time_coverage_end "2014-11-19T00:20:00Z";
    String time_coverage_start "2014-11-19T00:15:00Z";
    String title "ALOHA Cabled Observatory (ACO): Hydrophone Acoustics";
    String wmo_platform_code "5100275";


Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its projection constraints (external link).

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

griddap request URLs must be in the form{?query}
For example,[(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.

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