# Contour Label and Area Calculation - U magnitude in ParaView

**URL:** https://discourse.paraview.org/t/contour-label-and-area-calculation-u-magnitude-in-paraview/8884
**Category:** ParaView Support
**Created:** [February 2, 2022, 8:06pm UTC](https://discourse.paraview.org/t/contour-label-and-area-calculation-u-magnitude-in-paraview/8884 "2022-02-02T20:06:07Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![pavel](https://discourse.paraview.org/user_avatar/discourse.paraview.org/pavel/32/8287_2.png) [@pavel](https://discourse.paraview.org/u/pavel)
#### Post date: [February 3, 2022, 8:22am UTC](https://discourse.paraview.org/t/contour-label-and-area-calculation-u-magnitude-in-paraview/8884/2 "2022-02-03T08:22:56Z")

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Hello Mary,

Regarding question #1:  
[Is it possible to add labels to contour lines?](https://discourse.paraview.org/t/is-it-possible-to-add-labels-to-contour-lines/1466)  
Example made based on that discussion (using _Interactive Select Points On_ tool + _Edit-\>Find Data_):

![Countour_labeling](https://discourse.paraview.org/uploads/default/original/2X/3/3e606806b596ef5df34c49fcf8d959f56a470887.png)

Regarding question #2:  
you could apply Countour filter with requested range of U magnitude values, then CellSize filter, and finally IntegrateVariables filter. In the Information panel you’ll see the area of interest. Example:

1.Model

 ![1_Model](https://discourse.paraview.org/uploads/default/original/2X/6/6f8ae00230a9d6bc839ebbc63610f1fc5ef9df6c.png)

2.Countour filter:

2A. Set range:

![2a_Countour_filter_range](https://discourse.paraview.org/uploads/default/original/2X/7/7b11bf17b5fa005fb63ab8f2c49c2945589d7bbd.png)

2B. View after filter applying:

 ![2b_Countour_filter_range_result](https://discourse.paraview.org/uploads/default/original/2X/2/280d8b1a0b21826c676c14d91057271ac84633da.png)

3.CellSize filter - Area array (on Infromation tab):

![3_CellSize_Area_array](https://discourse.paraview.org/uploads/default/original/2X/2/239860e7b9df93d48630ec721c3e544483b0766a.png)

4.IntegrateVafiables filter - Total area of region of interest (on Information tab):

![4_IntegrateVariables_Area_for_U_magnitute_selected_range](https://discourse.paraview.org/uploads/default/original/2X/1/1c2e8b18abdcb8aeb2cb6abdf913fb341e72f221.png)

You can also use Python Calculator filter for the last step.

Hope it helps.

Best Regards,  
Pavel

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