OS OpenData masterclass 2013 – Cartographic Design workshop 1 Quantum GIS 1 Quantum GIS Quantum GIS (QGIS) is a user-friendly Open Source Geographic Information System (GIS,) licensed under the GNU General Public License. QGIS is an official project of the Open Source Geospatial Foundation (OSGeo). It runs on Linux, Unix, Mac OSX, Windows and Android and supports numerous vector, raster, and database formats and functionalities. 2 OS OpenData The latest release is QGIS 2.0.1 (Dufour). 3 OS VectorMap District QGIS provides a continuously growing number of capabilities provided by core functions and plugins. You can visualise, 4 Create a backdrop map style manage, edit, analyse data, and compose printable maps. Step 1: Open a QGIS project You can view the user guide at http://qgis.org/en/documentation/manuals.html Step 2: Styling point data Step 3: Styling line data Step 4: Styling polygon data Step 5: Labelling Step 6: The brief Cartographic Design workshop | 2 2 OS OpenData 1 Quantum GIS OS OpenData™ offers a wide range of digital map products that you can freely view or download, for use in both personal and commercial applications. 2 OS OpenData There are over 10 quality assured, continuously updated products, from postcodes and boundaries to digital maps, providing a one-stop shop to start using OS OpenData products. 3 OS VectorMap District OS OpenData can be used with other open datasets available on data.gov.uk and from other sources to enhance your existing 4 Create a backdrop map style data or applications. OS OpenData can be found at Step 1: Open a QGIS project http://www.ordnancesurvey.co.uk/business-and-government/products/opendata-products.html Step 2: Styling point data Step 3: Styling line data Step 4: Styling polygon data Step 5: Labelling Step 6: The brief Cartographic Design workshop | 3 3 OS VectorMap District 1 Quantum GIS OS VectorMap District lets you overlay your own information on a map. It can be customised by selecting and styling features in different ways. OS VectorMap District contains only the most important information to give you a clear, uncluttered backdrop map. 2 OS OpenData OS VectorMap District is a mapping dataset designed for providing contextual mapping output on paper, PCs, hand-held 3 OS VectorMap District devices or the Internet. The vector format of the product consists of layers to enable you to customise and style output to suit your needs. 4 Create a backdrop map style The product is available in three formats: • as a tiled national vector dataset in Esri® Shapefile format; Step 1: Open a QGIS project • as a tiled national raster dataset in Tagged Image File Format (TIFF); and • as a tiled national set of vector data in Geography Markup Language (GML). Step 2: Styling point data The product can be used as mapping in its own right or can be used to provide a flexible geographic context reference for Step 3: Styling line data customers’ overlay information. More information can be found at Step 4: Styling polygon data http://www.ordnancesurvey.co.uk/business-and-government/products/vectormap-district.html Step 5: Labelling 3.1 What you need to use OS VectorMap District Step 6: The brief OS VectorMap District vector data is supplied in Shapefile format and will require specialist software for data translation and manipulation. OS VectorMap District GML Simple Features data may require specialist software for data translation and manipulation (data opens in open source software). OS VectorMap District raster data is supplied in GeoTIFF and can be viewed using imaging software. GeoTIFF provides geographical placing of data in a geographical information system (GIS) without the need for additional TIFF Worldfiles in TFW and TAB formats. Cartographic Design workshop | 4 4 Create a backdrop map style 1 Quantum GIS These notes have been compiled for use with version 2.0.1 ‘Dufour’ of QGIS. We will be using OS VectorMap District and data obtained from data.gov.uk 2 OS OpenData OS VectorMap District layers – Building, Land, NamedPlace, RailwayStation, RailwayTrack, Road, SurfaceWater_Area, SurfaceWater_Line, Woodland 3 OS VectorMap District data.gov.uk – GP_Locations 4 Create a backdrop map style 4.1 Exercise Step 1: Open a QGIS project For this exercise, OS VectorMap data has already been ordered through the OS OpenData website and loaded to your machine and added to a QGIS project. Step 2: Styling point data The GP_Locations data has also been downloaded from data.gov.uk and added to the same QGIS project. Step 3: Styling line data All the data has been cut into a manageable chunk covering an area within South East London. Step 1: Open a QGIS project Step 4: Styling polygon data • If you do not already have QGIS opened load it from either the desktop icon or from the start menu. Step 5: Labelling • To open an existing project select the Open Project button . • Navigate to Desktop\Carto Workshop\Carto_Workshop.qgs and press OK. Step 6: The brief Step 2: Styling point data Let’s begin by familiarising ourselves with some of the useful tools found within QGIS. • Now set the scale of your document to ‘1:15000’ by entering it into the scale box found in the bottom right hand side of your editor window. Cartographic Design workshop | 5 1 Quantum GIS Let’s restyle the point symbol currently used to style the railway stations. Layers 2 OS OpenData • Double (left) click on the layer RailwayStation found in your window on the left hand side of your editor window. 3 OS VectorMap District 4 Create a backdrop map style Step 1: Open a QGIS project Step 2: Styling point data Step 3: Styling line data • Navigate to the Style tab within the Layer Properties window. Step 4: Styling polygon data Step 5: Labelling Step 6: The brief • Highlight the Simple marker element of the Marker currently being used to depict your railway stations. Cartographic Design workshop | 6 1 Quantum GIS • Keep the Symbol layer type set to Simple marker and select the ‘circle’ symbol. 2 OS OpenData 3 OS VectorMap District 4 Create a backdrop map style Step 1: Open a QGIS project Step 2: Styling point data • Next double click on the Fill colour box. Step 3: Styling line data • Change the RGB colour to R200 G0 B3 and OK. Step 4: Styling polygon data Step 5: Labelling Step 6: The brief • Keep the border colour as black. • Change the size of your marker to 3.0 and its outline width to 0.4. You can change the unit of measurement from Millimeter to Map unit if you prefer by clicking on the dropdown. Cartographic Design workshop | 7 1 Quantum GIS • You also have the option within your Layer Properties to change the angle and offset (X and Y) of your symbol. This can be done by changing the values within the relevant boxes. 2 OS OpenData • You can also change the Symbol layer type by clicking on the dropdown. 3 OS VectorMap District 4 Create a backdrop map style Step 1: Open a QGIS project Step 2: Styling point data Step 3: Styling line data Step 4: Styling polygon data Step 5: Labelling Step 6: The brief Ellipse marker – selection of ellipse markers. Font marker – allows you to select a representation for your symbol using a font character. If you have created your own font you will need to load this to your PC font library in order for QGIS to recognise it. Simple marker – simple selection of shape markers. SVG marker – allows you to select an SVG image from a QGIS library or navigate to one of your own. Vector field marker – allows you to style using fields within your data’s attributes. For instance you could depict and set the direction of a flow arrow using its attribution. • Press OK. • At this point it’s worth saving your workspace. Select Project>Save As and navigate to Desktop\Carto Workshop. Save your workspace as Carto_Workshop_step2.qgs and click Save. Cartographic Design workshop | 8 1 Quantum GIS Step 3: Styling line data 2 OS OpenData • Double (left) click on the layer Road. • Navigate to the Style tab and change the drop down to ‘Categorized’. This will allow us to style the line data within this layer by an attribute. 3 OS VectorMap District 4 Create a backdrop map style Step 1: Open a QGIS project Step 2: Styling point data Step 3: Styling line data Step 4: Styling polygon data Step 5: Labelling Step 6: The brief • Change the Column drop down to ‘classifica’. This is the line data’s classification and is the attribute by which we wish to style the data. Cartographic Design workshop | 9 1 Quantum GIS • Click on the Classify button. You should now have thirteen symbol representations each with a different Value/Label. 2 OS OpenData 3 OS VectorMap District 4 Create a backdrop map style Step 1: Open a QGIS project Step 2: Styling point data Step 3: Styling line data Step 4: Styling polygon data Step 5: Labelling • Double click on the symbol that currently represents A Road. Step 6: The brief Cartographic Design workshop | 10 1 Quantum GIS • A Symbol selector window should now have appeared. We are going to show A roads using a road casing and a road fill. This means we require two lines to represent this style – a 2 OS OpenData line on top of a line. 3 OS VectorMap District • To do this press the Add symbol layer button . 4 Create a backdrop map style NOTE: you must make sure you have the Line element of your Symbol layer highlighted before doing this.