Archive for March, 2015
The March 24th webinar covering the Add, Display and Manage menu options is now available here.
During our webinar today one of the participants asked if Depiction was compatible with the USNG. At the time I wasn’t sure what he was referring to. He was kind enough to have an expert in its use drop me a line and point me to some resources. So here is what I have found out so far. USNG stands for US National Grid system. You can find a very complete description here.
The USNG is a based on the UTM coordinate system. Depiction does have the ability to display locations in the UTM format.
There is a website called the US National Grid Information center where you can find shape files for download. However what I discovered was that these downloads have lots of data in them and you can’t have a depiction boundary too large and load one of these shape files because it can bring Depiction to its knees. A couple of them I checked out had around 65,000 shapes. When I tried to load one of these for a large area it brought Depiction to its knees. However, for smaller areas you are able to import the file.
This Depiction area is 65 x 39 miles and has about 6600 shape elements. Depiction was able to read it and display it but I noticed the program was a little sluggish. Especially when it had to display all 6600 shapes. If you turn off the display of the shapes and display the shapes in a smaller revealer you will get much better performance. It is having to redraw those 6600 shapes everytime that you do something that causes the program to slow down.
So in order to use this go to the US National Grid Info Center web site.
Choose the region you are interested in.
Choose the zone that covers your area of interest. Click on it and will start a download. Choose a location were you want the file to be downloaded. Once it is downloaded open the zip file and do an “extract all” and place the results in a folder of your choosing. Then start a depiction, keeping the size to around 2500 square miles or less. Then go to the add menu and choose the file option and browse to your folder. Choose the file with the .SHP extension and auto detect for element type and click add and it will bring the file in. When the shapes come in they are assigned random colors but if you want no color then you can go to the manage menu. Select all of the shapes and choose edit. That will bring up this screen.
scroll down to the ZOI Fill field and click on it which will bring up the color palate. In the bottom right there is an option for no color. Choose that say apply and the colors will disappear.
Hope that will help those of you interested in the national grid.