Am 08.12.2012, 14:35 Uhr, schrieb S. Wagenaar <sw1...@planet.nl>:
These articles may be useful: Join data from a CSV file: http://www.qgis.nl/2012/07/13/koppelen-van-data-uit-csv-bestand/?lang=en Directly use data from Excel file: http://www.qgis.nl/2012/07/17/direct-gebruiken-van-data-uit-excel-bestand/?lang=en
Seems the excel import is version and/or platform dependent: In dev under linux mint, it doesn't work at all. Drag and drop produces "blabla.xls is not a valid or recognized data source" and through the normal vector adding dialog, there is no way to make the xls visible and selectable.
csvt-files are quite annoying as well. I think "old" excel-versions -> dbf or openoffice/libreoffice -> dbf are still the easiest ways to produce joinable tables ... unfortunately.
Maybe the string problem can be solved with mmqgis-plugin-> modify -> Text to Float (no fitting test data at hand)
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