compareAVHRRimages: Compares a single AVHRR image processed by different...

In steingod/R-mipolsat: Useful functions for handling locally processed satellite data

Description

This function reads the output from readAVHRR and compares AVHRR images generated by different processing chains to visualize any important differences in processing. An image is created.

Usage

compareAVHRRimages(x, y, channel=1, map=TRUE, method="N")  

Arguments

x	R object (list) returned by readAVHRR
channel	channel identification
map	logical telling whether coast lines should be added
merthod	letter specifying how to combine channels ("D" is difference, "R" is ratio, "N" is none)

Value

None

Note

The current version supports map overlay only for the standard map projection of the OSISAF HL centre. That is Polar Stereographic correct at 60 degrees North and not rotated.

Author(s)

Øystein Godøy ([e-mail])

See Also

readAVHRR, createAVHRRimage, compareAVHRRchains

Examples

    # Read a AVHRR image from processing chain 1
    t1 <- readAVHRR(file="/data/avhrr/noaa18_03452_200610191134.h5")
    # Read a AVHRR image from processing chain 2
    t2 <- readAVHRR(file="/data/avhrr_old/noaa18_03452_200610191134_03456.h5")
    # Generate image on graphical device
    compareAVHRRimages(t1,t2)

steingod/R-mipolsat documentation built on May 30, 2019, 2:31 p.m.