Combining two section data files in ODV 1. Import first data file into ODV using "File --> Open" ... as previously 2. Export as ODV collection "Export ---> ODV Collection" Select all variables for export, click "OK" There will now be a file ending .ODV in your directory containing the collection. You can now add new sections/data to this collection First you must add new Collection Variables for the new properties/variables you will bring in from the new sheet: In the toolbar, click "Collection", "Properties", "collection Variables" Click "New" to add new variables (Those which were not in the original sheet but will be in the new sheet). When done accept the changed collection 3. Now import the second section: From toolbar select "Import" "ODV Spreadsheet" Choose the other sheet/file Then in Spreadsheet properties choose "Space" or "TAB" delimiter, click OK Associate latitude and longitude When you get to the "Import Options" dialog, make sure that you choose "Merge Data" (drop down menu top left) !!!! then associate the new variables with the Collection Variables you created. CLick OK You should now have a merged data set!!!!