Easier access to scientific data
Brought to you by PermafrostNet, and The Digital Research Alliance of Canada
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PermafrostNet ERDDAP
Easier access to scientific data |
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Brought to you by PermafrostNet, and The Digital Research Alliance of Canada |
NSERC PermafrostNet ERDDAPERDDAP 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. This particular ERDDAP installation has permafrost data (for example, data from borehole logs and temperature loggers).Individual DatasetsEach borehole or study site is given its own dataset. This makes it easy to provide detailed metadata for each location which means searching for specific data using the advanced search is more likely to return what you are looking for. Datasets are distributed on this ERDDAP for convenient downloading using either interactively using the web interface or from the REST API using a scripting language. Each dataset contains metadata describing its provenance and relevant citation information. In addition to providing access to data that has been generated or digitized by NSERC PermafrostNet, this ERDDAP provides access to data from other permafrost data providers [1, 2] that has been dis-aggregated to site-level.Aggregated DatasetsThe individual 'site-level' datsets have been combined into large aggregations that can be subsetted, queried and downloaded using the ERDDAP capabilities. Data can only be aggregated if they have the same spatio-temporal dimensions. Currently two large aggregated datasets exist:
StandardsPermafrostNet has adopted several metadata standards for use with the ERDDAP. For a full description of the metadata variables used on each dataset, refer to the PermafrostNet metadata profile. This profile adopts metadata attributes from the Attribute Convention for Data Discovery (ACDD) and the Integrated Ocean Observing System (IOOS) to increase interoperability. It also defines metadata attribute names for permafrost-specific site characterization metadata that are commonly found across multiple permafrost databases. These include vegetation type (vegetation_type) and whether permafrost is present (permafrost_status).
Advantages to accessing data on ERDDAP
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Start Using ERDDAP:
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| Protocol | Description |
|---|---|
| griddap datasets |
Griddap lets you use the OPeNDAP hyperslab protocol to request data subsets, graphs, and maps from gridded datasets (for example, satellite data and climate model data). griddap documentation |
| tabledap datasets |
Tabledap lets you use the OPeNDAP constraint/selection protocol to request data subsets, graphs, and maps from tabular datasets (for example, buoy data). tabledap documentation |
| "files" datasets |
ERDDAP's "files" system lets you browse a virtual file system and download source data files. WARNING! The dataset's metadata and variable names in these source files may be different than elsewhere in ERDDAP! You might prefer using the dataset's Data Access Form instead. "files" documentation |
| WMS datasets |
The Web Map Service (WMS) lets you request an image with data plotted on a map. WMS documentation |
and
ERDDAP Dataset Discovery.
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 Name |
Metadata
ERDDAP has an
FGDC Web Accessible Folder (WAF)
with FGDC‑STD‑001‑1998 metadata files and an
ISO 19115 Web Accessible Folder (WAF)
with ISO 19115‑2/19139 metadata files for all of the geospatial datasets in this ERDDAP.
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
| 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. |
