Sprial encoding technique

DenzilRockman

5	5	5	5	1	1	1	1
1	1	2	2	2	2	1	1
1	1	2	2	2	2	3	3
1	1	2	2	2	3	3	3

How would one compress the following data using a "spiral" encoding technique? Regards, Denzil

JoeBorgione

I am currently doing a course on GIS, and this was 1 of the questions that we had to go and research.

B B E E E E
A A A E E E
D D B E E E
D D B B E E
D D D D D E
D D D D E E

(See above) If the compressed run length encoding is as follows 2,B,7,E,3,A,2,D,1,B,5,E,2,B,7,D,3,E,4,D


What would the spiral  encoding technique be below.
5 5 5 5 1 1 1 1
1 1 2 2 2 2 1 1
1 1 2 2 2 2 3 3
1 1 2 2 2 3 3 3
1 1 1 1 7 7 4 4
1 1 1 1 7 7 4 4
1 1 1 1 4 4 4 4
1 1 1 1 4 4 4 4

If I should write the spiral code would it be as follows 4,5, 4,1,4,3,3,2...

Regards,

Denzil

Tell you what Denzil-  I've only got 23 years in the field, and this is something I've never heard of.  Granted, I'm just a gray haired middle aged guy and perhaps this has slipped by me....