Unit 5: Data (APCSP '23-24 code.org)

Images can contain a geographical location of where the picture was taken. This is stored in a special area of an image file called:

• Metadata
• File name.
• Compression area.
• Alpha-channel.

DATA or Metadata?

Example: an image file

the color information for each pixel

• data

• metadata

DATA or Metadata?

Example: an image file

the width of the picture in pixels

• data

• metadata

DATA or Metadata?

Example: an image file

the date and time that the picture was taken

• data

• metadata

DATA or Metadata?

Example: an image file

the geo Tag that stores where the picture was taken

• data

• metadata

DATA or Metadata?

Example: a log of phone calls on your phone

check all that would be probable metadata in the log.

• phone number that was dialed

• when the phone call was made

• duration of the call

• what was said during the call

• whether the call was an incoming or outgoing call

DATA or Metadata?

Example: a list of popular websites

check all that would be probable metadata in the list.

• url of the website

• when the website first appeared

• how many total visitors the website has had

• how many visits the website has had in the last week

• whether MR. Schlamann likes the website or not

DATA or Metadata?

Example: a financial record of donations to a charity.

check all that would be probable metadata in the record.

• dollar amount of the contribution

• method of contribution (check, cash, credit card)

• name of person making donation

• date of donation

• how many donuts the charity orders each year.

The main information stored is referred to:

• data

• metadata

Extra information about the main information stored is referred to:

• data

• metadata