1.1.3 Overview of GMT 4.1.1 [Mar-1, 2006]

Changes in GMT 4.1.1 are mostly minor; a brief listing include

1. gmt_nc.c: Introduced handling of 4-D COARDS compliant grids (See Chapter 4 for details).
2. mgd77/mngd77sniffer: New tool for along-track quality control checking of MGD77 files.
3. spotter/grdrotater: New tool that rotates grids given a specified finite rotation.
4. Jonathan Shewchuk's triangulation routines are now stored with the rest of the source in the GMT_progs.tar$\vert$zip archives. (However, because his copyright is not GPL, installing it is still an option).

A few programs or options have received minor updates and new features, such as

grdedit

: Added option -T to toggle between gridline and pixel registrations (header only).

grdgradient

: Implemented variation on Lambertian illumination.

grdmask

: Now takes -Sradius[c$\vert$m$\vert$k$\vert$K] as is done in nearneighbor.

gmtmath

: If file is STDIN we read data from stdin and put the contents on the stack. Also added -F to select which columns to use for output [all].

grdtrack

: Can now sample Sandwell/Smith IMG grids directly.

mgd77/mgd77.c

: Added mechanism to search directories for files.

mgd77/mgd77list

: Activated -X option and associated machinery for applying data corrections.

psmask

: -Now takes -Sradius[c$\vert$m$\vert$k$\vert$K] as is done in nearneighbor. Can now plot tiles regardless of projection and use patterns.

pstext

: -D[...]vpen can now be used with or without -M.

psxyz.c

: -SO$\vert$U imitate -So$\vert$u but without the 3-D color shading.

Inevitably, when new features are added, new bugs come along with them. Below is a list of problems that we have identified and corrected in the current release:.

configure.in

: Extracting VERSION from gmt_version.h, not gmt.h.

gmt_init.c

: BASEMAP_FRAME_RGB overrode any changes to grid pens etc. Now only does so if prefixed by '+'.

gmt_calclock.c

: Did not allow -B0 for time-axis.

gmt_map.c

: -JX...d now plots with WESN or degrees:minutes as per PLOT_DEGREE_FORMAT. Map clip paths for -JElon/$\pm 90$ were no good. Under certain circumstances, GMT_non_zero_winding might be passed a polygon that was not closed, resulting in an error. -JQ would give garbage if central lon was way outside -R.

gmt_plot.c

: -JX...d now plots with WESN or degrees:minutes as per PLOT_DEGREE_FORMAT.

gmt_grdio.c

: Changed logic to avoid false ``scale==0'' warning on Windows. GMT_open_grd (used in grdblend) reset scale to NaN. Initialize header information at start of GMT_read_grd_info.

gmt_support.c

: Initialize [xyz]_unit with more appropriate values. Got wrong conversion for dx in meters to degrees.

gmt_grd.h

: Improved definition of GMT_x_to_i macro should reduce bugs

pslib.c

: ps_polygon: if outline == -9 just fill and no clip. Fixed two bugs concerning the /MaskColor operator.

ISO-8859-9.ps

: Added /dotlessi per Onur Tan.

blockm*.c

: Now correctly deals with periodic longitude data.

grdcontour.c

: Fixed several issues at grid limits and inappropriate scaling of grid dimensions..

grdfilter.c

: Used -1 as index flag instead of INT_MIN.

grdimage.c

: Fixed several issues at grid limits and inappropriate scaling of grid dimensions.

grdmask.c

: Only let you change the value for outside nodes.

grdmath.man

: Did not list -f option. Operators LT, LE, EQ, GE, GT returned TRUE if NaNs were involved Now NaN is returned if any of the two operands is a NaN.

grdreformat.c

: Update grd.command before writing grid

grdvector.c

: Did not place vectors correctly for pixel-pregistered grids.

grdview.c

: Skipped nodes outside boundary but they might be needed to draw a tile.

pscoast.c

: With -JE and -Gr/g/b, the painting of the antipodal bin would incorrectly turn off clipping, messing up the rest of the plot. Now pass -9 to GMT_fill which means just fill and no end of clipping.

xyz2grd.c

: For geographic grids with 360$^{o}$ range and gridline registration, the west and east bin did not get replicated properly. Now considers data inside the first and last tiles which might stick outside w/e/s/n.

x2sys/x2sys_cross.c

: Several problems fixed.