0.18 % of all data carrying default values

[michaelaye]

I have identified 5764 fan classifications (0.172 %) and 7365 blotch classifications (0.177 %) that carry the signature of default values at coordinates (0,0)!, that in my opinion are hard to create on purpose due to the inherent difference between mouse cursor position and exact position where a marking is positioned at mouse-click (i.e. they are several pixel apart) I found the below linked stacks of classifications by doing a search for

• blotches that have (x, y, radius_1, radius_2, angle) == (0, 0, 10, 10, 0 )
• fans that have (x, y, distance, angle, spread) = (0, 0, 10, 0, 1)

Here is a plot over time, showing how many of these have been found with the same classification_id. This is also the meaning of the number in below linked files: It's how many entries for this classification_id carry these default data values.

Sometimes the same user creates these kind of classifications with a different classification_id for the same image_id, maybe related or just a problem on top of the #100 issue.

Here are the files with the metadata for these kind of classifications:

https://www.dropbox.com/s/zo046s9vsv7e918/default_data_fans.csv https://www.dropbox.com/s/ukd1xwo1ujzz4hg/default_data_blotches.csv

[mschwamb]

@chrissnyder this is something we'd like to talk about on the telecon. Is this something you can take a look at for the call next week? Thanks, ~Meg

[mschwamb]

Is this something @brian-c you could answer?

[brian-c]

If it's the same users, I'd guess it's a browser issue. Does your data come with the userAgent field from the classifications?

[michaelaye]

No, it doesn't. These are our fields:

"classification_id","created_at","image_id","image_name","image_url","user_name","marking","x_tile","y_tile","acquisition_date","local_mars_time","x","y","image_x","image_y","radius_1","radius_2","distance","angle","spread"

[michaelaye]

@parrish Maybe we could have the userAgent field in a database dump, then I could have a look myself if this is browser related?

[mschwamb]

@parrish and @chrissnyder if this is a simple query with the saved mongo db copy of the classification database, can you send us the mongo db? Or if you wouldn't mind could you make the query yourself and see if there is a single browser associated with the 0,0 markings, we'd appreciate it.

[mschwamb]

talked to Chris Lintott. I have a suggested plan for moving forward with dealing with these. He also suggested a few checks to do with to verify that it's likely a java script dropout. I will summarize on the next science telecon

[parrish]

I've added the user agent field to the data export. You should've received an email, but I'll send around a link just in case.

[mschwamb]

As per the December telecon, I think since the December telecon. we've sorted this as a script drop and able to remove them. I've written up what i discussed on the telecon in the current paper draft. Can we close this ticket for bookkeeping?

Thanks.