Sometime ago I wrote: > I'd like a cheap digital camera to use when I'm out noting > things for mapping purposes; our existing camera eats > batteries.
Firstly thanks for all the advice, but in the end I decided the camera on my phone was of adequate quality. I had tried using it once before, but it (a Nokia 6300) doesn't write the time the phone was taken into the EXIF properties used by JOSM when I import images against a trace. However, the date created property of the file itself was correct, and I've just written a program (VB 2008) which copies the date created file property into the EXIF image property - tag ID 36867 as per the document here: http://www.exif.org/Exif2-2.PDF and a code example from here: http://www.eggheadcafe.com/articles/20030706.asp that I converted to VB and then changed to loop through all JPG images in a folder selected with a FolderBrowserDialog. Private Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click 'Get list of files in directory Dim objFolderInfo As System.IO.DirectoryInfo = New System.IO.DirectoryInfo(FolderBrowserDialog1.SelectedPath) For Each objFileInfo As System.IO.FileInfo In objFolderInfo.GetFiles("*.jpg") Dim strFilename As String = objFileInfo.FullName lstProgress.Items.Add(strFilename) Application.DoEvents() WriteNewDescriptionInImage(strFilename, Format(objFileInfo.CreationTimeUtc, "yyyy:MM:dd HH:mm:ss")) Next End Sub The main changes to the code example were to get the correct tag ID in a valid PropertyItem, hardcoding the length to 20 (as per spec document above, where Type 2 = ASCII), and the use of GetPropertyItem and SetPropertyItem based on the remarks here: http://msdn.microsoft.com/en-us/library/system.drawing.image.setprop ertyitem.aspx ' put the new description into the right property item objPropertyItem = Pic.GetPropertyItem(272) With objPropertyItem .Id = 36867 .Type = 2 .Len = 20 .Value = bDescription End With Pic.SetPropertyItem(objPropertyItem) Anyway, I'd kept the images and traces from my test on 25th August and tested in JOSM and once I'd set the offset to +1 to sync clock they were all positioned perfectly. I can now double check that I remembered correctly where each was taken when I was doing the tagging that day; I'd had to rely on memory rather than seeing them in JOSM, and that isn't always the best... I've sufficient memory in my phone for plenty of these low res images, and I can recharge the phone easily. Ed PS: I don't know whether the full VB code is of any use to anyone, but if anybody does want it let me know. _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb