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Introduction

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In Geocap it is the responsibility of the user to secure that data have the correct Datum and Coordinate system, also called a Projection or Geodetic settings. Datasets with the same geographical location but with different coordinate system will not be displayed in the same location in the graphical window. Thus, you will need to convert one of the datasets to the other coordinate system.

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Sticky Surface

Geocap has a concept where any surface can be set to be sticky. When a surface is sticky, data like points, lines or images may be displayed onto that surface. This is mainly done by re-sampling lines and displaying them a little bit above the sticky surface. When a surface is activated (or set) as a sticky surface, it is copied to workspace under the name sticky_surface.

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Icons	Description of Main Toolbar icons
	Will cancel any mouse action that is started but is regretted and should be ended without any operation.
	Start a mouse action that when clicked on a graphical object will delete that object.
	Start a mouse action that when clicked on a graphical object can set appearance parameters for that object. The appearence parameters are: Opacity, Reflection, Diffusion, Ambience.
	Start a mouse action where the user is supposed to click on a surface that is map with scalar values. The mapping range of the scalar values according to the color table can then be adjusted.
	Start a mouse action that when clicked on a graphical object will highlight the corresponding data object in the project.
	Start a mouse action where the user can click and draw a rectangle around displayed data and Geocap will list all dataset names and locations.
	Will delete all graphics in the current viewport or window (if the window holds only one viewport). The corresponding references to actors in the project are deleted. Frequently used in free interactive work.
	Will delete the last graphical object (also called and actor) that is displayed. Frequently used to erase a graphical object that shall be removed. Note: Redisplaying data from the project using the same command will erase the previous corresponding actor.
	Will set the graphical window in 2D mode; i.e. only pan and zoom is allowed. The view direction (x, y or z) depends on the corresponding setting. In 2D mode the left button on the mouse is used for immediate cursor response for instance in digitizing.
	Will set the graphical window in 3D mode; pan, zoom and 3D rolling is enabled. The default 3D mode renders in perspective view; i.e. parallel lines are not parallel on the screen, but shows a perspective.
	Will turn the z direction of the graphical window upwards; i.e. the positive direction of the z axis points upwards.
	Will turn the z direction of the graphical window downwards; i.e. the positive direction of the z axis points downwards. This is the default case because most surfaces are below the zero level, but still have positive z values.
	Will show the graphical window as a frame box. It is important to use this icon to check the graphical window or whenever some display comes out weird if the display algorithm uses the graphical window to set display parameters.
	Will draw default axes for all visible axes directions. No tick marks are display for simplicity, but the exact location of an annotation position starts at the beginning of the annotation.
	Will open a Navigator which is a convenient menu for navigating a 3D graphical scene. To some (especially newbies) it can be difficult to use the mouse buttons to orientate the graphics. Be aware that rotation is around the focal point which also can be set by pointing the cursor mouse at a any location on a solid object and push keyboard x.
	Will zoom in towards the focal point. The graphical window is not changed, although the graphical frame may lie out the visible part of the screen.
	Will zoom out from the focal point.
	Will View from above. This icon also contains sub-icons for viewing in other directions.
	If several windows are created on the same Tab, this icon connects the selected windows to the same visual camera. Very useful when different surfaces that shall be compared are displayed in separate windows that are connected and show the same under all graphical movements.
	Will show the viewport menu that allows for a quick way to create viewports inside a window. The number and layout of the viewports are determined by just double clicking on the lower right frame in the veiwport menu. If the viewports are connected they can also by used for simultaneously display of surfaces or features that shall be compared.
	Enables the light source to be moved around in the graphical scene. Will create shadows and highlight features. Usefull for presentation graphics and detailed studies of special structures.
	Will scale the graphical scene with all its actor up or down. Very important for selecting a good view. The scaling should also preferable be set in the Project Settings so that the preferred view comes up when loading a project.
	Will show up a 2D compass in upper right that follows the rotation of the graphical window. Another click on the icon will remove the compass.

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