Dear grass users
I'm from Japan and begginer user of grass GIS.
I tried to draw earthquake map of tohoku Japan.
First, I summarized of some earthquake data, for example lat, lon, depth and m
agnitude.
---------------------------------
lon lat depth Magnitude
---------------------------------
139.9, 37.7, 10, 3.1
141.0, 35.8, 10, 2.6
142.7, 40.8, 20, 4.4
...
---------------------------------
Second, this text data was imported to grass data by using v.in.ascii, as foll
ows;
cat data.txt | v.in.ascii fs=',' cat=0 x=1 y=2 out=quake columns='x double pre
cision, y double precision, depth integer, mag double precision'
So, I typed to 'v.vect quake'
These points where the earthquake were displayed by cross (x) .
Next, I tried to display new map as circle size of earthquake-magnitude.
v.vect quake size=magnitude
However, unsuccessful....What should I do?
Yasuo shimada ( Japan weathere association )
