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CO-OPS ERDDAP
ERDDAP (the Environmental Research Division's Data Access Program) is a data server that gives you a simple, consistent way to download subsets of scientific datasets in common file formats and make graphs and maps. ERDDAP also provides Data Access Forms (Web pages) which help humans create the OPeNDAP (Open-source Project for a Network Data Access Protocol) requests. CO-OPS has implemented a particular ERDDAP installation to offer observational water levels, meteorological and ancillary data via tabledap (ERDDAP's implementation of the OPeNDAP constraint protocol). The users of this application can view and download different datasets or sub-samples of interest, and search for interesting datasets with ERDDAP. Available datasets include air gap air temperature barometric pressure conductivity raw six minute currents raw six minute currents (ancillary) water Temperature wind visibility relative humidity raw one minute water level raw six minute water level verified six minute water level verified hourly heights water level verified high lows water level verified daily mean water level verified monthly mean water level Please see List of All Datasets for more information. Easier Access to Scientific Data Our focus is on making it easier for you to get scientific data.Different scientific communities have developed different types of data servers. For example, OPeNDAP, WCS, SOS, OBIS, and countless custom web pages with forms. Each is great on its own. But without ERDDAP, it is difficult to get data from different types of servers: Different data servers make you format your data request in different ways. Different data servers return data in different formats, usually not the common file format that you want. Different datasets use different formats for time data, so the results are hard to compare.ERDDAP unifies the different types of data servers so you have a consistent way to get the data you want, in the format you want. ERDDAP acts as a middleman between you and various remote data servers. When you request data from ERDDAP, ERDDAP reformats the request into the format required by the remote server, sends the request to the remote server, gets the data, reformats the data into the format that you requested, and sends the data to you. You no longer have to go to different data servers to get data from different datasets. ERDDAP offers an easy-to-use, consistent way to request data: via the OPeNDAP standard.ERDDAP returns data in the common file format of your choice. ERDDAP offers all data as .html table, ESRI .asc and .csv, Google Earth .kml, OPeNDAP binary, .mat, .nc, ODV .txt, .csv, .tsv, .json, and .xhtml. So you no longer have to waste time and effort reformatting data. ERDDAP can also return a .png or .pdf image with a customized graph or map. ERDDAP standardizes the dates+times in the results. Data from other data servers is hard to compare because the dates+times often are expressed in different formats (for example, "Jan 2, 2018", 02-JAN-2018, 1/2/18, 2/1/18, 2018-01-02, "days since Jan 1, 1900"). For string times, ERDDAP always uses the ISO 8601:2004(E) standard format, for example, 2018-01-02T00:00:00Z. For numeric times, ERDDAP always uses "seconds since 1970-01-01T00:00:00Z". ERDDAP always uses the Zulu (UTC, GMT) time zone to remove the difficulties of working with different time zones and standard time versus daylight saving time. ERDDAP has a service to convert a string time to/from a numeric time. ERDDAP has web pages (for humans with browsers) and RESTful web services (for computer programs). You can bypass ERDDAP's web pages and use ERDDAP's RESTful web services (for example, for searching for datasets, for downloading data, for making maps) directly from any computer program (for example, Matlab, R, or a program that you write) and even from web pages (via HTML image tags or JavaScript). You can also build other useful and interesting things on top of ERDDAP's web services — see the Awesome ERDDAP ![]() For a quick introduction to ERDDAP,
watch the first half of this
Find out more about ERDDAP. Data Providers: You can
set up your own ERDDAP server
and serve your own data.
ERDDAP is free and open source. It uses Apache-like licenses,
so you can do anything you want with it.
ERDDAP's appearance is customizable, so your ERDDAP will reflect your institution, not NOAA.
The small effort to set up ERDDAP brings many benefits.
If you already have a web service for distributing your data,
you can set up ERDDAP to access your data via the existing service
or via the source files or database.
Then, people will have another way to access your data
and will be able to download the data in additional file formats
or as graphs or maps.
ERDDAP has been installed by over 90 organizations in at least 14 countries.
NOAA's Data Access Procedural Directive ![]() ![]() ![]()
Converters In addition to serving data, ERDDAP has some handy converters: Acronyms Convert a Common Oceanic/Atmospheric Acronym to/from a Full Name FIPS County Codes Convert a FIPS County Code to/from a County Name Interpolate Interpolate Values From Gridded Dataset Values Keywords Convert a CF Standard Name to/from a GCMD Science Keyword Time Convert a String Time to/from a Numeric Time Units Convert UDUNITS to/from Unified Code for Units of Measure (UCUM) URLs Convert Out-of-Date URLs into Up-to-Date URLs Variable Names Convert a Common Oceanic/Atmospheric Variable Name to/from a Full NameMetadata
ERDDAP has an FGDC Web Accessible Folder (WAF)
with FGDC‑STD‑001‑1998 RESTful Web Services You can bypass ERDDAP's web pages and use ERDDAP's RESTful web services (for example, for searching for datasets, for downloading data, for making maps) directly from any computer program (for example, Matlab, R, or a program that you write) and even from web pages (via HTML image tags or JavaScript). RESTful Web Services documentation Other Features Status The Status web page is a quick way to check the current status/health of this ERDDAP, including a list of datasets which failed to load. Out-Of-Date Datasets The Out-Of-Date Datasets web page displays a list of near-real-time datasets, ranked by how out-of-date they are. Subscriptions ERDDAP has an email/URL subscription system so that you can be notified immediately whenever a dataset changes (for example, whenever new data is added to a near-real-time dataset). Slide Sorter Anyone can use ERDDAP's Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide. |
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