Great channel and content bro. It's nice to see other youtube educators make a difference in the field of Remote Sensing and GIS. I too have a small channel where I try to bridge the gap between spatial and data science and I look forward to seeing more from you and wish you the best in your journey. Keep making great content. Just subscribed to your channel!
I appreciate that very much! I visited your channel and subscribed to your channel. It seems like you are uploading great content that will be very useful for our GIS and remote sensing community.
@@geodev Thanks you bro! I your GIS and esp web based GIS is a skillset every one in the spatial science can benefit from and I hope to complement it with my RS based works :)
Thank you for your review! I recommend you to follow this link for kappa value calculation: www.google.com/url?sa=t&source=web&rct=j&url=web.pdx.edu/~nauna/resources/9-accuracyassessment.pdf&ved=2ahUKEwi0gOCoyenkAhV373MBHZLcCt0QFjAJegQIAxAB&usg=AOvVaw1q6MiParvvafj1I8ml5ovQ
This is a great video. I have 2 quick questions. The first one is if all true value points were selected by you randomly? ( I mean if we can pick some points by ourselves if we do not have true field data) The second question is can we check the accuracy for each landuse classification? (for example, check the accuray for cultivation and vegetation). I am looking forward to your response. Thank you very much!
@@geodev Thanks for your answer. Could you please describe more details about how to check false positive and false negative values? I am a beginner and I really would like to learn more. Do you have another video related to this? I am looking forward to your response. Thank you very much.
This video is great! Question. If I am doing a change detection and have 2 images (before and after), do I need to do 2 accuracy assessments with 2 separate random point shapefiles, one for each photo? Thank you!!
Sorry, If you are following my tutorial, then accuracy represented by diagonal from upper left to lower right. Other values denotes the errors with corresponding classes. If you get the result something like you postex here, this mean you got more errors.
Great channel and content bro. It's nice to see other youtube educators make a difference in the field of Remote Sensing and GIS. I too have a small channel where I try to bridge the gap between spatial and data science and I look forward to seeing more from you and wish you the best in your journey. Keep making great content. Just subscribed to your channel!
I appreciate that very much!
I visited your channel and subscribed to your channel. It seems like you are uploading great content that will be very useful for our GIS and remote sensing community.
@@geodev Thanks you bro! I your GIS and esp web based GIS is a skillset every one in the spatial science can benefit from and I hope to complement it with my RS based works :)
@@EcoresolveInc Yes sure. We can help each other.
pro trick: you can watch series on flixzone. I've been using them for watching all kinds of movies lately.
@Ryker Gael Yup, I have been watching on flixzone} for months myself :D
Brilliant video thank you for making this.
Glad you enjoyed it!
dai 15:32 ma total sample lida kina small value include nagreko ?total ta 134 huna parne hoina
True values matra linu parxa so .... Predict value lina mildaina.
Simple and best way to calculate accuracy... thanks for the video, please explain how to calculate kappa value
Thank you for your review!
I recommend you to follow this link for kappa value calculation: www.google.com/url?sa=t&source=web&rct=j&url=web.pdx.edu/~nauna/resources/9-accuracyassessment.pdf&ved=2ahUKEwi0gOCoyenkAhV373MBHZLcCt0QFjAJegQIAxAB&usg=AOvVaw1q6MiParvvafj1I8ml5ovQ
can you tell me about the raster file attribute which you used to co relate with the point check shapfile
This raster is the reclassified raster file using Landsat 7 data.
hi...
I have one doubt that for total true value you are adding highest no. of value or you are taking diagonal values? please respond
I am talking about the diagonal values... The diagonal values are true value for each class other values than diagonal are the errors.
@@geodev thanks
Can the same method be adopted for the accuracy assessment of built up area extracted using ndbi?
Yes exactly. The accuracy assessment will be same.
This is a great video. I have 2 quick questions. The first one is if all true value points were selected by you randomly? ( I mean if we can pick some points by ourselves if we do not have true field data) The second question is can we check the accuracy for each landuse classification? (for example, check the accuray for cultivation and vegetation). I am looking forward to your response. Thank you very much!
Yes, the points are random.
For checking the accuracy of one class, you need to check the false positive and false negative values.
@@geodev Thanks for your answer. Could you please describe more details about how to check false positive and false negative values? I am a beginner and I really would like to learn more. Do you have another video related to this? I am looking forward to your response. Thank you very much.
please I have comma values in the RASTERVALU what do I have to do?
How did you insert the values into raster tables?
This video is great! Question. If I am doing a change detection and have 2 images (before and after), do I need to do 2 accuracy assessments with 2 separate random point shapefiles, one for each photo? Thank you!!
Yes, of course, you need 2 accuracy assessments. For that either you can use the same shapefile or different shapefile.
what does dos mean? what image are u using?
I am using landset image. It is the series of the land use land cover map generation. Well in this video I tried to cover the accuracy assessment
hello GIS and Remote sensing what is the diagonal is from lower left to upper right some thing like
2 10 30
3 20 10
25 12 6
Sorry, If you are following my tutorial, then accuracy represented by diagonal from upper left to lower right. Other values denotes the errors with corresponding classes. If you get the result something like you postex here, this mean you got more errors.
what is the name of this kind of accuracy assessment?
This is the "error matrix" method. You can also use kappa statistics.
21 0 0
0 20 0
0 0 20
Is it correct ? Does that mean 100 percent accurate?
Yes this mean 100% accurate
great
Thank you
you have made a mistake in total sample sum
Can you check which part did I mistake?
@@geodev Very Nice video, Thanks alot. There is mistake in total sample value, should be 134. So total accuracy will be = 79.85%.
bolera garau... bujhnai garo vo
Next time sure hai ta