Functions related to grid attributes
========================================

To use the functions explained in this page, please follow the 
steps below:

1. In [Object Browser] of Pre-processing window, select the item under
   [Grid] / [Node attributes] or [Grid] / [Cell attributes], like [Elevation (m)].

2. Launch the function from the right-clicking menu on the item.

[Generate point cloud data]
--------------------------------

**Description**: Generate [Point Cloud Data] from the values of the selected grid attribute.

A [Point Cloud Data] is generated in the [Geographic Data] group that corresponds
to the grid attributes.

When the points are generated, the coordinates of the points are as below:

* **[Node attributes]**: The coordinates of grid nodes
* **[Cell attributes]**: The coordinates of the center of grid cells

[Export]
-------------

**Description**: Generate [Point Cloud Data] from the values of the selected grid attributes, and save it to 
Topography file (\*.tpo\).

Refer to :ref:`sec_file_tpo` for the file format of Topography file.

[Show Attribute Browser]
---------------------------

**Description**: Show attribute browser.

When the menu is selected, [Attribute Browser] is shown under [Object Browser].

:numref:`image_attribute_browser` shows an example of [Attribute Browser].

.. _image_attribute_browser:

.. figure:: images/attribute_browser.png
   :width: 200pt

   Example of [Attribute Browser]

While [Attribute Browser] is shown, you can use it with the following operations:

* When mouse cursor hovers on grid, the list of attribute values at the node (or cell) under the cursor is shown in [Attribute Browser].
* When the mouse left button is clicked, the target to show attributes is fixed.
* When the mouse left button is clicked when the cursor is out if grid region, the target to show attributes is cleared.