No worries! You could also use 100% of labels for training. Of course this means that you cannot do the testing step. The testing is there to evaluate the performance and quality of learned model. It is mostly used when developing new method, or tuning some parameters. It is not required if you just want the classification results. But without it, you will be unable to tell if it's a good one or not!
Some people even split the reference data into 3 subsets: training, validation and testing, for various reasons. See this interesting page: http://stats.stackexchange.com/a/19051 There are other way to evaluate a classification model (leave-one-out, cross validation, etc.), but a 70/30 split into training and testing is a simple and common one. Victor Poughon ________________________________ De : [email protected] [[email protected]] de la part de michel M [[email protected]] Envoyé : mercredi 26 octobre 2016 14:13 À : otb-users Objet : [otb-users] Re: exercice corrigé (training.shp et testing.shp) Thanks victor but for me it's not again clear ... For exemple I have a shape file with data source corine land cover , i have a crop code , a label and a geometry I put 70% of records in a testing file and 30% of others records in a training file and after i don't understand the mécanism .... why not just all records in a training shape file many thanks On Monday, October 24, 2016 at 5:54:38 PM UTC+2, michel M wrote: Bonjour, Suite au dernier corrigé de Montpellier (Theia) , a partir de la page 14 classification supervisée pour les séries multitemporelles Je ne comprends pas la difference entre training et testing ) en effet je suis en train de faire un petit test ( téléchargement de 9 images landsat sur THEIA de l'année 2014 , déja orthorectifié ... et corriger au niveau atmosphérique ) pour visualiser les cultures sur une zone... Dans les corrigés ils ont 2 fichiers shapes training.shp et testing.shp -- training contient la donnée d'apprentissage -- testing contient la donnée de validation ( je comprends bien que training c'est les zones d'entraînement choisi par l'utilisateur ) et testing c'est quoi ??) - si par exemple je vais créer un fichier shape provenant des cultures de RPG2014 (recensement parcellaire graphique ) , je vais le mettre en training est ce OK ? mais testing ( je ne vois pas ) Pouvez vous m'éclairer ? merci Michel -- -- Check the OTB FAQ at http://www.orfeo-toolbox.org/FAQ.html You received this message because you are subscribed to the Google Groups "otb-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/otb-users?hl=en --- You received this message because you are subscribed to the Google Groups "otb-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]<mailto:[email protected]>. For more options, visit https://groups.google.com/d/optout. -- -- Check the OTB FAQ at http://www.orfeo-toolbox.org/FAQ.html You received this message because you are subscribed to the Google Groups "otb-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/otb-users?hl=en --- You received this message because you are subscribed to the Google Groups "otb-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
