GMT使用手册分析.ppt

3: makecpt: 制作绘图文件 4：pstext 写字符串 5：grdcontour 绘等值线 6：psscale 绘制色彩比例尺 7：gedimage 求图形梯度 8：grdgradient 绘制彩色图 9：grdview 绘制 mesh-plot 六 GMT PARAMETERS The following is a list of the 55 parameters that are user-definable in GMT. Note that distances and lengths are given in inch.(1in=2.54cm) ANOT_MIN_ANGLE [20] If the angle between the map boundary and the annotation baseline is less than this minimum value (in degrees), the annotation is not plotted (this may occur for certain oblique projections). ANOT_FONT [Helvetica] Font used for tick mark annotations etc. Specify either the font number or the font name. ANOT_FONT_SIZE [14] !坐标轴标注的字体大小 Font size in points for map annotations. ANOT_OFFSET [0.075 inch] !坐标轴标注和tick的距离 Distance from end of tickmark to start of annotation. BASEMAP_AXES [WESN] !四面坐标轴标是否画出，缺省都画 Sets which axes to draw and annotate. Upper case means both draw and annotate, lower case means draw axis only. BASEMAP_FRAME_RGB [0/0/0] !map坐标轴标注和框架的颜色 Color used to draw map boundaries and annotations. BASEMAP_TYPE [FANCY] !坐标轴框架的类型，FANCY：火车道，PLAIN：直线. COLOR_BACKGROUND [0/0/0] !背景色 Color used for the background of images (i.e., when z lowest colortable entry) COLOR_FOREGROUND [255/255/255] !前景色 Color used for the foreground of images (i.e., when z highest colortable entry). COLOR_IMAGE [ADOBE] Selects which operator to use when rendering bit-mapped color images. Due to the many definitions of the colorimage operator, GMT offers 3 different implementations: ADOBE (Adobes colorimage definition) TILES (Plot image as many individual rectangles). SEPARATION (Use 3 image calls for color separation). The last method is only to be used to produce PostScript files for processing with the psto24 application; if submitted to other interpreters the job may crash. It is only intended as a way to create 24bit rasterimages from PostScript on Sun 8bit workstations. COLOR_MODEL [