gid
Features Hydrological Rivers MajorRivers[system r_name geom_id the_geom ]
Features Hydrological Rivers MajorRivers system[ | gid]	M
grid: /gid (unitless) ordered (0) to (97) by 1.0 N= 98 pts :grid	M
Features Hydrological Rivers MajorRivers system[ | gid]	M
Features Hydrological Rivers MajorRivers system[ | gid]	M

SOURCES .Features .Hydrological .Rivers .MajorRivers system 1 index .system gid exch 2 index

Filters

Here are some filters that are useful for manipulating data. There are actually many more available, but they have to be entered manually. See Ingrid Function Documentation for more information.

• Monthly Climatology calculates a monthly climatology by averaging over all years.
• anomalies calculates the difference between the (above) monthly climatology and the original data.
• Integrate along gid
• Differentiate along gid
• Take differences along gid

Average over gid |
RMS (root mean square with mean *not* removed) over gid |
RMSA (root mean square with mean removed) over gid |
Maximum over gid |
Minimum over gid |
Detrend (best-fit-line) over gid |

Convert units from ids to

Note on units