Merge multiple map layers into a single shapefile using Quantum GIS | StatSilk

Explore interactive maps: World's top universities | Most liveable cities | Football rankings | more This article describes how to merge multiple Shapefiles using the free Quantum GIS software. It also describes how to create an interactive layered map using StatPlanet Plus. The layered map works by making map areas with no data invisible. This allows one to selectively hide layers of map areas for which there is no data. It is achieved by setting the variable ‘MAP-ND-TR’ to ‘TRUE’, found in the ‘Settings’ worksheet of the StatPlanet Data Editor. Data is then imported layer by layer, selectively filling only columns (i.e. map areas) that are relevant to that layer. Columns that have no data are not shown. This means that when all objects from all relevant layers are merged into a single Shapefile, StatPlanet Plus can be made to display information for selected objects simply by not putting any data in the columns that relate to other layers. You will need a set of polygon Shapefile layers. These need to be aligned correctly to each other and merged into a single Shapefile. The merged Shapefile will have merged all the attributes of your individual layers but you will need to tidy it up. Ultimately all you need is two columns in the final DBF: one with a unique ID and one with the area name. Things to bear in mind at the DBF preparation stage: You will now be setting up the merged Shapefile within StatPlanet so that the Data Editor can see all the names and IDs ready for importing of data. If you have a visible map, you can now start to prepare data ready to import data using the StatPlanet Data Editor. The layered map works by setting MAP-ND-TR to ‘TRUE’ to make columns (i.e. map areas) that have no data invisible. Data is then imported layer by layer, selectively filling only columns that are relevant to that layer. Columns that have no data are not shown. Hopefully after a couple of runs at this set of methods, you will be able to create multi-layered maps without significant difficulties. Once a map is set up any amount of data can be imported from any number of sources quite easily. Version 1.0 by John B Grenfell, May 2013 Hello I have a question Can i make a map in StatPlanet with different shapefile (polygon and line)? Thank's All exported map and graph images are licensed under a Creative Commons Attribution 3.0 Unported License. See also: attribution. Source.


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Last Modified: April 22, 2016 @ 5:05 pm