|Figure 1. -general view of earthquakes.|
Saturday, 25 April 2015
Animation of earthquakes (including aftershocks) in Nepal from 2015-04-25T07:00:00 to 2015-04-25T23:07:17 by hours.
Сondolences to the families of the victims!
Data for this map was taken from USGS. USGS is a science bureau within the United States Department of the Interior. It can be available with menu item of OpenWebGIS: "GeoDataBase->Earthquakes Database"
You can analyze this data using all the opportunities of OpenWebGIS interface if you open this web-link.
What is clustering features on the map? - This is merging of close to each other features in one feature. What may it be useful for? - It may be necessary when a large number of features clutters the map and a user wants to hide the excessive information at the moment. As well clustering is useful when it is needed to get information on the amount of any objects on a territory quickly - not counting them and without using the menu item "Calculation". Let's look at some examples.
After applying the clustering method in the legends settings layer "Cities", the map can look like shown in Map 1.
Friday, 24 April 2015
Now the new opportunity has appeared to embed animated maps in your site or blog. Have a look at the example of such embedding on the Map 1 and in Figure 1a (source map). This article uses the maps that contain a lot of animated data, and therefore for their correct displaying the fast internet is desired. If you have a problem with the map displaying, try to refresh the page.
Map 1-The animated map of the earthquakes all over the world with magnitude 8 and more in 1900-2014 years. For this map the time interval for each year is set - 2500 milliseconds. For further information about this map you can read here
Animated maps in OpenWebGIS are understood as maps, on which there are layers containing the attribute with the date/time values and where with the help of the "Time Line" function is started the process of layer changes drawing according to date/time changes.
Instruction on how to animate your OpenWebGIS map can be read in this article: http://openwebgis.livejournal.com/643.html or see this video:
Saturday, 18 April 2015
Use the opportunities of free and open geographic information system OpenWebGIS to create your maps and share them with friends and colleagues. As example study the map of ancient roads and ports in Italy and surrounding areas. See this map on Figure 1 and use embedding interractive map - Map 1. About how to embed OpenWebGIS map in your sites or blogs read the article: http://openwebgisystem.blogspot.com/2015/04/blog-post.html
Thursday, 16 April 2015
Why can it be convenient for you to use and embed OpenWebGIS maps in your sites and blogs? Because it is a completely free online project without advertising. You can use the extensive mathematical functionality to calculate and analyze your data, you can create 3D map. Using OpenWebGIS you will get online a Geographic Information System at your disposal, it may be similar in functionality to some desktop GIS. You can get some ideas of the OpenWebGIS possibilities, if you read the article from this list.
In order to get a web-link or an embedding code, click on the globe icon in the toolbar on the map (see Figure 1).
You can read more about creating a web-link in this article. To get an embedding code of your map you must use the area of pop-up window (it appears after clicking on the globe icon) that is highlighted with the green rectangle in Figure 1.
There can be several variants:
The First variant. Just click on the button "Yes - get code"(see Figure 2). After clicking this button the embedding code of the map will appear in the appropriate text area "embedding code:". Select, copy and insert this code in your site code.
Then the result will be the map with all toolbars on the map. But if you reduced or increased the size of the map (the default size of which is the 1000 pixels width and the 600 pixels height), then after code inserting in your site, the map will be embedded in the default size and therefore it can be cut on the right or on the left (for example not all buttons will be visible on the top of the map) as it is shown in the Map 1. You can watch the video on how to change the map size (including the usage of the “additional toolbar. Set size of the Map” button):
So in order to save the map size and the interface while embedding it is necessary to activate the checkbox “save interface” before pressing the button "Yes - get code" (see Figure 3). The result can be seen in the embedded Map 2.