Virtual Earth – a great tool to identify the nearby places
Virtual earth can be used for several different purposes in various sectors. Its capabilities and functionalities are attracting more and more people to use it for number of tasks. In this article, we will look at how it can be utilized to find out the features nearby the desired location located on an ArcGIS Server map.
In general, this is used for identifying several features at a specific point location like, when a user clicks on the particular point on the map. The similar kind of approach can be utilized when user has a place resultant from a different operation, and if he wishes to have map features in surroundings. For instance, if user utilizes either ArcGIS server or Virtual Earth for locating a particular address by utilizing the geocoding, then you can find the features in the surroundings of that location.
By using ArcGIS Server, user can also accomplish inquiry task with help of the more sophisticated associations. Features within a particular shape or intersecting with other shapes or other features can be examples for above-mentioned case. You can view the desired code by visiting the website. You can closely understand the task of “Identifying things on the map" by using the Interactive Software Development Kit.
User can search for features into the map layers, which are located within a particular distance of a desired point. For this user obtain the desired point from the user with a click on the map. Another operation like geocoding can accomplish the resultant point to several other applications. Here, the distance in the region of that point to search is hard-coded. However, user input can be utilized to find out the search radius.
For this, user has to develop a web page by means of a fundamental Virtual Earth map. First, you have to add a position reference in the ArcGIS client Java-Script. This is the basic need of every page to utilize the Extension ArcGIS Java-Script for the Virtual Earth. After this, user has to insert this into the header section, which is located just beneath the reference of the Virtual Earth’s script. Next, you have to insert variables into the script block prior to the On Page Load function in the header of that page. What you need is to have them at the global scope as you have to reutilize all of them into more than a single function. The place of the map service, which will render both query service and map display, specifies the tile URL. User can get the service URL from the system administrator. If user is aware of the URL for the particular server, then he can obtain it through its Services Directory. The identify Tolerance is the numeric value related with the pixels about the clicks of user. This can be utilized for searching for several map features.
User can utilize other shape sorts for identifying query, like a polygon or a line. With this it is now possible to have an enormously sophisticated application for accomplishing the task. The user can search for the desired packet by means of entering the particular address. The specific code inquires the packet layer for gaining a polygon. After this the shape of the polygon can be utilized for finding out the schools or any desired feature within the nearby distance of the packet.
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