[Magellan-users] Further work on Magellan

[Asdis Benediktsdottir]

Hey all,

Just wanted to put in several things on the 'to-do' list that has to be 
done for next version (not the 0.3 version) of Magellan:

1. _Add artificial bathymetry_ - Currently the user needs a data file 
with bathymetry. A feature has to be added so the user can run magellan 
with out a data file. We would use the equation of seafloor deepening 
with age for this.
2. _Add option to specify distance between calculated points_ - 
Currently Magellan only calculates the model where data points are, i.e. 
if a user has data points with 3-km spacing, Magellan will calculate 
data at this point which will leave out small reversal periods. A 
feature where the user can choose the spacing between calculated points 
would be good. There might be a problem with the bathymetry since we 
would 'ideally' have to spline in between bathymetry points to get a 
depth value at the artificial point Magellan creates (this is how the 
algorithm works, the bathymetry and data lists have to be the same 
length). Another way to approach the problem would be to use the nearest 
bathymetry value, since it doesn't change drastically over small lengths 
(this would make the problem way easier).
3. _Allow choice of axis_ - Create the options -x<lower/upper> and 
-yb<lower/upper> [for the bathymetry] and -ym<lower/upper> [for the 
model] so the user can choose the upper and lower limits of the axis.
4. _Save calculation output in a file_ - Save the parameters needed to 
create the figure so the user doesn't have to ru
n magellan again just to get the figure (pickle). This could be useful 
if the user want to plot the data elsewhere, i.e. using GMT.
5. _Change the reading of the data file _- Currently Magellan uses 
Modmag's input file format (distance, lon, lat, depth, anomaly) but 
Magellan's data file should contain three columns (distance from ridge, 
depth, anomaly)
6. _Add an option _- There is no option for the azimuth of the profile 
(-d) or for the obliuqe (-o?) angle to which the ridge is spreading 
(like 30 deg for the Reykjanes Ridge). The -d optioin is very important 
and has to be implemented before we release version 0.3.


That is all for now!
Ásdís