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map_viewer [2012/05/21 23:59]
romulo created 		map_viewer [2013/02/01 16:52] (current)
admin [How To / Tutorials]
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 The map viewer is the tool designed to view and interpret map information. The map viewer is the tool designed to view and interpret map information.
  
-===== Main Window ​===== +===== Main Components ​=====
-The main window is where the most important information regarding the viewer +
-state is located. On the left you have the toolbar related to the **viewer** +
-state as a whole, on the right you have a list of loaded maps and tools to +
-manage them.\\+
  
-{{ :​main_window.png?​nolink& ​| }}+  * [[Map Viewer Interface|Map Viewer Interface]]
  
-===== Toolbar =====+  * [[Color Palette|Color Palette]]
  
-\\ +  * [[Histogram|Histogram]]
-{{:​toolbar_num.png?​nolink& ​|}}+
  
-Each toolbar button is described below: +  ​* [[viewer_image_expression|Calculate Expression]]
-1) Load map erasing the current stack, load maps using the current stack, replace maps and load saved viewer state.\\ +
-2) Save viewer state (save transformations,​ map stack, background color and movie maker settings.\\ +
-3) Save current visualization (including legend if visible) as a bitmap image).\\ +
-4) Reload current selected map.\\ +
-5) Open movie maker (allow users to make *.mp4 movies from a series of maps in a easy way).\\ +
-6) Create map groups (grouping maps allow users to apply calculate expressions on top of a custom stack).\\ +
-7) Toggle map legend (and if image is currently in category mod, toggle categories visualization).\\ +
-8) Zoom map extents to view window (render the map using the entire screen space available).\\ +
-9) Zoom in (zoom in over hovered cell).\\ +
-10) Zoom out (zoom out over hovered cell).\\ +
-11) Zoom to selection rectangle (selected rectangle will cover entire screen space available).\\ +
-12) Pan (allow users to movement the current visualization area).\\ +
-13) Previous view (if user is making many visualization steps, you can go back to last step using this button).\\ +
-14) Background color (change application background color).\\ +
-15) Quit.\\+
  
 +  * [[viewer_map_group|Map group]]
  
-===== Palette ​=====+===== How To / Tutorials ​=====
  
-Allow users to select which color represents each cell in visualization area.\\ +  * [[Load a map|Load a map /  Workflow]]
-Cells are first extracted from the map in their original values (in any range) and then re-sampled using the histogram curve.\\ +
-After that, their values fall in the [0, 255] range, which are mapped to palette colors.\\+
  
-{{ :​palette.png?​nolink& ​|}}+  * [[Make a movie|Make a movie]]
  
-\\ +  ​* [[Set map alias|Setup maps aliases]]
-\\ +
- +
-==== Changing colors individually ==== +
-{{:​palette_color.png?​nolink&​|}}  +
-Each color can be changed individually,​ by clicking on its square. You can also check color index value by hovering +
-your cursor over the color square. {{:​palette_color_hover.png?​nolink&​|}}\\ +
-\\ +
-\\ +
- +
-==== Generated palette ==== +
-You can also create a palette using a linear interpolation between two color values (gradient). All you have to do  +
-is click the gradient button and set your range.\\ +
-{{:​palette_gradient.png?​nolink&​|}}\\ +
- +
-After that, you can click the interpolate button and the new palette view be generated. +
-\\ +
-\\ +
- +
-==== Saving your work ==== +
- +
-Keep in mind that palettes are not saved until the user chooses to do so. If you made any mistake, you can just +
-hit "​cancel"​ and try again. If you hit Ok, the palette will be changed locally, but will reset if you restart +
-the application. Saved palettes are stored on the disk, so every time you reopen the map viewer, you will still +
-have them. +
- +
-===== Histogram ===== +
- +
-The histogram window is responsible for assigning transformations from image original values (in any range) to +
-palette range [0, 255]. The histogram curve will adjust any value smaller than the "​From:"​ limit to 0, and any +
-value greater than the "​To:"​ limit to 255. Any other values will be mapped using the histogram curve to the "​Y"​ +
-coordinate on the color palette on the left. +
- +
-{{ :​histogram.png?​nolink&​ |}} +
- +
-==== Transformations ==== +
-  ​* The default transformation doesn'​t map any values, leaving cell values "as is". +
-  * Linear transformation will map linearly any values between the "​from"​ and "​to"​ ranges. +
-  * Equalize will construct a curve based on [[http://​en.wikipedia.org/​wiki/​Equalization|Equalization]]+
  
 +  * [[Map viewer command line|Using command line to save images]]