Automatic Map Scale Generation 1.0

MAKESCALE creates a scale for map data. MAKESCALE creates a scale on the current axis based on the current axis limits. The scale is made to occupy 1/5th of the map. It is placed in the southeast corner of the map. The units will either be in milimeters, meters or kilometers, depending on the size of the map. MAKESCALE(H_AXIS) creates a scale on the axis specificed by the handle H_AXIS based on the its axes limits. H_AXIS must be a scalar. MAKESCALE(SCALE) creates a scale made to occupy 1/SCALE of the map. SCALE must be a scalar, and is bounded to be between 1.1 and 10. If a larger value is passed in, 10 will be used. If a smaller value is passed in, 1.1 will be used. MAKESCALE(LOCATION) places the scale in the location specified by LOCATION. Acceptable values for location are as follows 'northeast' 'ne' 'northwest' 'nw' 'southeast' 'se' 'southwest' 'sw' 'north' 'n' 'south' 's' MAKESCALE('units',UNITS) changes the units systems from SI to imperical units. UNITS should be either 'si' or 'imp.' The units displayed are automatically switched between milimeters, meters, and kilometers for the SI system, or between inches, feet, and statuate miles for the imperical system. H = MAKESCALE(...) outputs H, a 3x1 containing the handles of the of box, line, and text. Any number of these input sets may be passed in any order. The map scale will automatically be updated as the figure is zoomed, panned, resized, or clicked on. It will not, however, be updated upon using the commands "axis", "xlim", or "ylim" as these do not have callback functionality. Example: load conus figure plot(uslon,uslat); makeScale Example: Placed in the south load conus figure plot(uslon,uslat); makeScale('south') Example: Half the size of the Window load conus figure plot(uslon,uslat); makeScale(2,'south') Example: Use Imperical Units load conus figure plot(uslon,uslat); makeScale(2,'south','units','imp') Example: Zooming In load conus figure plot(uslon,uslat); makeScale(2,'south') zoom(2) Note: This assumes axis limits are in degrees. The scale is sized correctly for the center latitude of the map. As the size of degrees longitude change with latitude, the scale becomes invalid with very large maps. Spherical Earth is assumed. Ideally, the map will be proportioned correctly in order to reflect the relationship between a degree latitude and a degree longitude at the center of the map.By Jonathan Sullian - October 2011

Requirements:	No special requirements
Platforms:	Matlab
Keyword:	Callback,  Clicked,  Commands,  Makescale,  Quotaxisquot,  Quotxlimquot,  Quotylimquot
Users rating:	0/10