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| 3 | <meta http-equiv="CONTENT-TYPE" content="text/html; charset=windows-1252"><title>PALM chapter 4.5</title> |
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| 16 | <body dir="ltr" lang="en-US"> |
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| 17 | <h3 style="line-height: 100%;">4.5 Data analysis and visualization<br> |
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| 18 | </h3> |
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| 19 | <p style="line-height: 100%;">PALM is able to output |
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| 20 | data of different quantities as time series, |
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| 21 | vertical profiles (usually horizontally averaged), two-dimensional |
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| 22 | cross sections or <font color="#000000">3d-volume data.</font> |
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| 23 | Depending on the kind of output (time series, profiles, etc.) and the output format (ASCII or binary) data are written |
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| 24 | to different files (file descriptions can be found in |
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| 25 | <a href="../app/chapter_3.4.html">chapter |
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| 26 | 3.4</a>). By default, all data |
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| 27 | output files are in NetCDF format (link to the NetCDF documentations in |
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| 28 | the Internet and on the PALM homepage), which can be processed by many |
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| 29 | public domain and commercial (graphic) software. Data from NetCDF files |
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| 30 | can also be easily read from FORTRAN programs provided that a NetCDF |
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| 31 | library is available. More detailed informations about the |
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| 32 | PALM-NetCDF-output is given in the next subchapter (<a href="../app/chapter_4.5.1.html">4.5.1</a>).</p> |
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| 33 | |
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| 34 | <p style="line-height: 100%;">Due to historical reasons, PALM can also |
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| 35 | output data in other formats suitable for some special graphic |
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| 36 | software. The exact format of these files corresponds to the |
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| 37 | requirements of the respective software. Still available at IMUK are <a href="http://www.muk.uni-hannover.de/institut/software/profil_beschreibung.html">profil</a> |
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| 38 | (time series, profiles), <a href="http://www.muk.uni-hannover.de/institut/software/iso2d_beschreibung.html">iso2d</a> |
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| 39 | (2d cross sections) and <b>AVS</b> (e.g. iso-surfaces of 3d volume |
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| 40 | data). The special files created by PALM can be directly used |
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| 41 | as input files for these plot programs. Beyond that, <b>profil</b> and |
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| 42 | <b>iso2d</b> need additional information |
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| 43 | about the plot layout (e.g. titles, axes labels, arrangement of the |
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| 44 | coordinate systems, etc.) provided by so-called parameter files<font color="#800000">. |
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| 45 | </font><font color="#000000">Thes</font>e files are also created by |
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| 46 | the PALM, providing a default layout (e.g. plots produced by <b>iso2d</b> |
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| 47 | show. only isolines and no color shading). Within certain |
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| 48 | limits the plot layout can be steered by some PALM parameters. |
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| 49 | Beyond that the user can edit the parameter files created by PALM and |
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| 50 | change, supplement or remove the given default values |
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| 51 | according to his needs. Beside the file with the (binary) data to be |
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| 52 | visualized, <b>AVS</b> additionally needs a file with |
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| 53 | coordinate information (likewise binary) and an ASCII file in the |
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| 54 | so-called FLD format, which describes the structure of the two binary |
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| 55 | files. Coordinate and FLD file are also created by the PALM. However, |
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| 56 | with <b>AVS</b> (differently than with <b>profile</b> or <b>iso2d</b>) |
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| 57 | the plot layout must always be additionally designed by the user |
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| 58 | with the help of the AVS network editor. </p> |
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| 59 | |
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| 60 | |
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| 61 | <p style="line-height: 100%;">In the following subchapters, steering |
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| 62 | of the different data output and how to create plots of the data is |
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| 63 | described by some examples. Not all details of steering |
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| 64 | are mentioned. If necessary, these can be found within the |
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| 65 | description of the respective parameters.<br> |
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| 66 | </p> |
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| 67 | |
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| 68 | For most purposes it should be sufficient to read <a href="../app/chapter_4.5.1.html">chapter 4.5.1</a> which explains the PALM-NetCDF-output.<hr> |
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| 69 | <p style="line-height: 100%;"><br> |
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| 70 | <font color="#000080"><font color="#000080"><a href="chapter_4.4.html"><font color="#000080"><img src="left.gif" name="Grafik1" align="bottom" border="2" height="32" width="32"></font></a><a href="index.html"><font color="#000080"><img src="up.gif" name="Grafik2" align="bottom" border="2" height="32" width="32"></font></a><a href="chapter_4.5.1.html"><font color="#000080"><img src="right.gif" name="Grafik3" align="bottom" border="2" height="32" width="32"></font></a></font></font></p> |
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| 71 | <p style="line-height: 100%;"> <span style="font-style: italic;">Last |
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| 72 | change:</span> 05/03/05 (SR)<br> |
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| 73 | </p> |
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| 74 | </body></html> |
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