What is qgis grass

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I was working with GIS and remote sensing in a university and professional environment some ten years ago ArcInfo etc , so I have some experience even though somewhat outdated.

However, I do not really get the difference between the two programs. GRASS is usually used for scientific purposes. So unless you want to do some sophisticated spatial analysis or routine, just stick with QGIS. I think for simple mapping purposes you should use QGIS. So since you plan to work with thematic maps, which I assume are in vector format, I would recommend also take a look at this article who points some info on topology.

However, a lot of jobs with geodata up to final map is much more convenient in QGIS. Therefore my present experience:. Sign up to join this community. The best answers are voted up and rise to the top. Page last modified FinancesOnline is available for free for all business professionals interested in an efficient way to find top-notch SaaS solutions.

We are able to keep our service free of charge thanks to cooperation with some of the vendors, who are willing to pay us for traffic and sales opportunities provided by our website. Pricing: free. Pricing Model. List of Features. Pricing Info. Languages Supported. Prominent Clients. Available Devices. Company Size. These two types of systems are hard-hitting when it comes to data entry; they both perform magic. However, they somehow differ. GRASS GIS- during the data entry, you have to create fields integer, text, double, date, or float , and once the field is created, you cannot rename the field.

Rather, you have to create a new field. Then, you can copy your content over the new field. QGIS- with this system, you create your fields integer, text, double, date, or float where the data is added.

Start QGIS. For Gisdbase , browse and select or enter the path to the newly created folder grassdata. Click [OK]. The elevation layer will be visualized. The Alaska boundary vector layer will be overlayed on top of the gtopo30 map. You can now adapt the layer properties as described in chapter The Vector Properties Dialog e. Also load the other two vector layers, rivers and airports , and adapt their properties. Visualize the alaska. Then click [Next]. Define the projection by clicking on the radio button Projection to enable the projection list.

We are using Albers Equal Area Alaska feet projection. In Filter , insert to select the projection. Click [Next]. Here, we simply click on the button [Set current qg extent] , to apply the extent of the loaded layer alaska.

To import the raster map landcover. The module dialog for r. When it says Succesfully finished , click [View output]. To import the vector GML file lakes. The module dialog for v. Options The Options tab provides a simplified module dialog where you can usually select a raster or vector layer visualized in the QGIS canvas and enter further module-specific parameters to run the module. First, open the location by clicking the Open mapset button and choosing the Alaska location.

Now load the gtopo30 elevation raster by clicking Add GRASS raster layer and selecting the gtopo30 raster from the demo location. Now a single click on the tool r. The gtopo30 raster should appear as the Name of input raster. Type into the Increment between Contour levels the value This will create contour lines at intervals of meters.

Click [Run] to start the process. Wait for several moments until the message Successfully finished appears in the output window. Then click [View Output] and [Close].