Wikipedia:Graphics Lab/Resources/QGIS/Get ready: Difference between revisions

Revision as of 12:43, 23 September 2011

Revision as of 13:22, 23 September 2011

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You are now working with QGis, your GIS data—namely, ETOPO1—and your customized palette. To output your first topographic background, '''don't use ''File > Save as Image'', which is a simple screenshot.''' For better quality, use the ''Print composer''. This step will walk you through outputting a map like the one you see on the right, including a grid and an inset that lets the viewer know where in the world this section is located.

;Background

==Placing the main section for output==

# Zoom in on the section of the file you would like to output.

# To give a smooth, gradient-like appearance to the colors, go to ''Layer > Properties > Colormap > Color interpolation'' (at the top), and set it to ''Linear''.

# By default, the canvas of QGIS (geographic area visible in QGis) will become the area of interest for print composer.

# Open the ''Print composer'': ''QGIS (1.7)> File > New Print Composer (Ctrl + P)''.

==Placing the main section for output==

In the print composer:

# On the right, under ''General'', you can change the ''Size'' and ''Orientation'' of the image you will be outputting. A larger paper size and [[dots per inch|dpi]] means a higher quality, but don't go overboard! You don't want to end up with a huge file size that takes forever to upload and download.

# To add your map, you can either go to ''Layout > Add Map'' or click the ''Add new map'' icon in the toolbar.