Monday, February 27, 2017

How to enable Cloud Compare's Fine Registration (ICP) command

For the longest time, I tried to align two point clouds with CloudCompare's Fine Align (ICP) command. But unfortunately, the command would not enable for me no matter what I did. I selected one cloud, two cloud (or so I thought). Neither reading the documentation nor watching the YouTube videos helped. The screenshot below showed the deactivated Fine Align command in the tool bar.

It turned out that proper selection is key. I was using the SHIFT key to select one cloud folder node and another cloud folder node, which selected folders, and clouds among other things.

  1. The proper way was to press down the CTRL key while clicking on only cloud nodes in the tree view pane, as shown in the screenshot below. Once two cloud nodes have been selected, the File Align icon in the toolbar will become enabled.

    The File Align icon is enabled.
  2. Click the Fine Align icon.

    The Clouds registration dialog box appears.

Monday, February 20, 2017

Clear Javascript, CSS, and HTML web cache in Chrome

When developing Javascript code for web pages, the Chrome browser caches the Javascript code including cascading style sheets and HTML files. Any changes made to the code may not be reflected when the page is refreshed. I found this frustrating. That is, until I discovered that Chrome has a way to clear its cache before reloading the web page.

To enable this, do the following:

  1. Select Options (the 3 vertical dots icon on the top right) | More Tools | Developer Tools.

    The Developer Tools pane appears.
  2. Now, do a mouse-right click on the Reload Page icon, as shown in the screenshot below.

    A popup menu appears.

  3. Choose Empty Cache and Hard Reload.

    The cache is cleared and any any changes made to the code is reflected in the reloaded page.

Monday, February 13, 2017

Show Myanmar Datum 2000 coordinates with this Mapplet

Myanmar uses a Universe Transverse Mercator projection at Zone 46 (with a Myanmar Datum 2000). For convenience, this mapplet has been written to display and locate Myanmar easting, northing coordinates on Google Maps. To show the coordinates of a location on the map, just click a point on the map, as shown in the screenshot below. A marker Info window will pop up displaying the Myanmar Datum 2000 easting and northing coordinates, as well as the Geographic latitude, and longitude values.

Try out this mapplet at this location