G5NR Data Access Guide: Difference between revisions

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OPeNDAP is a data server architecture that allows users to use data files that are stored on remote computers with their favorite analysis and visualization tools. Opening an OPeNDAP file is as easy replacing the file name in the client software by an OPeNDAP URL. All G5NR collections that are provided by ftp/download-tool are also available on the OPeNDAP server

~~http~~://opendap.nccs.nasa.gov/dods/OSSE/G5NR/Ganymed/7km

https://opendap.nccs.nasa.gov/dods/OSSE/G5NR/Ganymed/7km

===== [[Recipe: Fortran program as OPeNDAP client|Fortran client]] =====

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===== R =====

This example requires the [~~http~~://cran.r-project.org/web/packages/ncdf4/index.html ncdf4] and [~~http~~://cran.r-project.org/web/packages/rworldmap/index.html rworldmap] packages.

This example requires the [https://cran.r-project.org/web/packages/ncdf4/index.html ncdf4] and [https://cran.r-project.org/web/packages/rworldmap/index.html rworldmap] packages.

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> jm <- 361

> lm <- 72

> nc <- nc_open("~~http~~://opendap.nccs.nasa.gov:9090/dods/OSSE/GEOS-5.12/BETA9/0.5000_deg/inst/inst01hr_3d_T_Cv")

> nc <- nc_open("https://opendap.nccs.nasa.gov:9090/dods/OSSE/GEOS-5.12/BETA9/0.5000_deg/inst/inst01hr_3d_T_Cv")

< t <- ncvar_get(nc,"t",start=c(1,1,1,37),count=c(im,jm,lm,1))

> str(t)

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===== IDV =====

[~~http~~://www.unidata.ucar.edu/software/idv/ IDV] is an OPeNDAP tool that can access and display the nature run data. In our OPenDAP server, all files are time aggregated, so they appear as a single dataset for each location.

[https://www.unidata.ucar.edu/software/idv/ IDV] is an OPeNDAP tool that can access and display the nature run data. In our OPenDAP server, all files are time aggregated, so they appear as a single dataset for each location.

This is an example to open and display the field 'T' (air temperature) from the collection 'inst01hr_3d_T_Cv'. The OPenDAP URL for this dataset is ~~http~~://opendap.nccs.nasa.gov:80/dods/OSSE/GEOS-5.12/BETA9/0.5000_deg/inst/inst01hr_3d_T_Cv. The following steps are valid for IDV version 5.0u1 running on a Linux desktop.

This is an example to open and display the field 'T' (air temperature) from the collection 'inst01hr_3d_T_Cv'. The OPenDAP URL for this dataset is https://opendap.nccs.nasa.gov:80/dods/OSSE/GEOS-5.12/BETA9/0.5000_deg/inst/inst01hr_3d_T_Cv. The following steps are valid for IDV version 5.0u1 running on a Linux desktop.

From the 'Dashboard' panel

@@ Line 37: / Line 37: @@
 OPeNDAP is a data server architecture that allows users to use data files that are stored on remote computers with their favorite analysis and visualization tools. Opening an OPeNDAP file is as easy replacing the file name in the client software by an OPeNDAP URL. All G5NR collections that are provided by ftp/download-tool are also available on the OPeNDAP server
-  http://opendap.nccs.nasa.gov/dods/OSSE/G5NR/Ganymed/7km
+  https://opendap.nccs.nasa.gov/dods/OSSE/G5NR/Ganymed/7km
 ===== [[Recipe: Fortran program as OPeNDAP client|Fortran client]] =====
@@ Line 51: / Line 51: @@
 ===== R =====
-This example requires the [http://cran.r-project.org/web/packages/ncdf4/index.html ncdf4] and [http://cran.r-project.org/web/packages/rworldmap/index.html rworldmap] packages.
+This example requires the [https://cran.r-project.org/web/packages/ncdf4/index.html ncdf4] and [https://cran.r-project.org/web/packages/rworldmap/index.html rworldmap] packages.
 <syntaxhighlight lang="rsplus">
@@ Line 62: / Line 62: @@
 > jm <- 361
 > lm <- 72
-> nc <- nc_open("http://opendap.nccs.nasa.gov:9090/dods/OSSE/GEOS-5.12/BETA9/0.5000_deg/inst/inst01hr_3d_T_Cv")
+> nc <- nc_open("https://opendap.nccs.nasa.gov:9090/dods/OSSE/GEOS-5.12/BETA9/0.5000_deg/inst/inst01hr_3d_T_Cv")
 < t <- ncvar_get(nc,"t",start=c(1,1,1,37),count=c(im,jm,lm,1))
 > str(t)
@@ Line 76: / Line 76: @@
 ===== IDV =====
-[http://www.unidata.ucar.edu/software/idv/ IDV] is an OPeNDAP tool that can access and display the nature run data. In our OPenDAP server, all files are time aggregated, so they appear as a single dataset for each location.
+[https://www.unidata.ucar.edu/software/idv/ IDV] is an OPeNDAP tool that can access and display the nature run data. In our OPenDAP server, all files are time aggregated, so they appear as a single dataset for each location.
-This is an example to open and display the field 'T' (air temperature) from the collection 'inst01hr_3d_T_Cv'. The OPenDAP URL for this dataset is http://opendap.nccs.nasa.gov:80/dods/OSSE/GEOS-5.12/BETA9/0.5000_deg/inst/inst01hr_3d_T_Cv. The following steps are valid for IDV version 5.0u1 running on a Linux desktop.
+This is an example to open and display the field 'T' (air temperature) from the collection 'inst01hr_3d_T_Cv'. The OPenDAP URL for this dataset is https://opendap.nccs.nasa.gov:80/dods/OSSE/GEOS-5.12/BETA9/0.5000_deg/inst/inst01hr_3d_T_Cv. The following steps are valid for IDV version 5.0u1 running on a Linux desktop.
 From the 'Dashboard' panel