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2

In layer properties go to Symbology tab. Then choose Categories and Unique Values, Many Fields. Choose your both fields and add values to the table with particular symbol and color to all of your combinations.


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An easy way to show overlapping features is by using the Intersect tool. Use your buffer dataset as the input and run the tool. It will create an output that will only show the overlapping areas. Unfortunately I am unsure how you could show this through symbology alone without any extra processing.


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Following on from what you wrote and the links in the comments sections, I got a more refined hatched boundary (only within the polygons). I used the "Difference Tool" (Vector/Geoprocessing Tools/Difference) and used the following settings to clip the buffer to the extent that I wanted: I used a -20m value for the buffer, but if you wanted longer ...


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You can insert pictures as symbols using the "Marker Symbol" in the style manager. In the Style Manager, after you have created your new style, you need to locate the Marker Symbols folder. You left-click with the mouse once and then move to the blank zone on the right. Here you right-click with the mouse, choose "new" and then "Marker Symbols". In ...


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There are X and Y field for point 1 and point 2 of a gradient. And they may be linked to fields of object. They sets a relative coordinates, as a fraction of bbox height and width. So if you could calculate a distance between airport and Voronoy's cell centroid, you may calculate these fractional offsets.


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I would recommend using the "Summary Statistics" tool on Filtered_Fires with Muni_Code as your case field and COUNT of OBJECTID (and anything else you're interested in symbolizing on) as your statistics field(s). This will create a table that you can then join back to your municipalities.


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Here is the code in C++ based on the post here : How to set Marker Line symbol for QgsVectorLayer by using Python? thanks to Durga for the link in his answer. So here is the code in c++ to change the style of the border of a polygon, in this exemple the color is white and the penstyle is dashed. QgsSymbolLayerV2Registry * MyRegistry = ...


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Refer this post in the SE ..it is for python.Same method can be used for C++


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As soon as you have more than one symbol (e.g. rule based symbology / categorized symbology) - i.e. as soon as it gets important to be able to distinguish different features based on their symbology - there is a label next to each symbol in the legend with a configurable description.


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Reason When you create a symbol it has ownership of its layers. When you add a layer to an existing symbol, it takes ownership of the added layer. Ownership means it is free to delete it whenever it wants. In your example both symbols assume ownership of symbol_layer2 (symbol2 because it created symbol_layer2, symbol1 because symbol_layer2 was added to ...


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You would need to symbolize all the buffers in a unique manner, and the symbology you choose would need to be some sort of pattern fill; lines, pictures, markers, etc. - something with transparency. The patterns would need to be set uniquely enough, via color and/or shape, such that when they overlap they are distinguishable. You can see a simple example of ...


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Assuming layer1 has symbology based on the field "symbol_field", and layer2 has a field "other_field" which contains data suitable to be symbolised in the same way as layer1: Add a field "symbol_field" to layer2 Copy the values from "other_field" on layer2 to "symbol_field" on layer2 Use arcpy.ApplySymbologyFromLayer_management(layer2,layer1)


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I think I was able to solve this myself, unless anyone has a better way of doing it. In MapInfo create a new column. Update this column using the value: objectinfo(obj,2). Then convert the file to a shapefile. After loading into QGIS use categorized symbol of the new column you created. The symbols wont be the same as in Mapinfo, but at least you are able ...


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You probably do not want different symbol layers (they will be painted on top of each other). You probably want to look into QgsCategorizedSymbolRendererV2 which lets you define multiple categories with a different symbol for each. setDataDefinedProperty is for defining a style property based on a feature attribute like the color defined by a field with ...


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Here's why it works that way: the CAD Renderer is not just a mapping of field names into our familiar ArcGIS multi-field symbol editor. The CAD Renderer (used by default when you drag/drop a DWG onto the ArcMap canvas) also invokes FME's DWG-file interpreter (or data interop extension, if you prefer.) The last stage of that interpreter is the ...


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Here is the code that could be used. The code is base on the reading of a s57 map . QList<QgsSymbolV2*> lSymbols = lrenderer->symbols(); QList<QgsSymbolV2*> lSymbolsToRender = lrenderer->symbols(); QStringList lListValue; lListValue << "0" << "3" << "5" << "10" << "15" << "20" ...


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Just to add to @MatthiasKuhn's answer, you can also add a Description to each symbol if it is considered too long or if you wanted to add additional details but not overcrowd the legend (i.e. this won't be shown in the legend):


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You can use Tilemill to create a cartocss style which you can then use with Mapnik (might need to convert to Mapnik XML). GeoServer supports SLD styles which you can create with many GIS tools, for example QGIS or OpenJUMP.


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ESRI provided an exercise for using geoprocessing tools for representation. In the final steps it demonstrates the process for masking and shows the results. http://resources.arcgis.com/en/help/main/10.1/index.html#//00s50000005n000000 I hope this helps!


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This is still an open bug in QGIS for CSV-layers http://hub.qgis.org/issues/8285


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Since I can't comment due to not enough reputation points, I wanted to mention that I was trying to deal with a similar issue (for anyone else that finds this page useful). I had been using Python and made a nice for loop that ran fine, however it did not update my symbology. I did find that you need to first open the .mdx document, set the df, update the ...



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