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Tag: spatial query

Querying & Editing GRID Files in Map Suite

Arc/Info ASCII Grid is one of many supported raster formats in Map Suite. In addition to displaying ESRI grid files you can also query and edit the data in Map Suite. Here is the latest sample demonstrating the ability for the user to select an area of the grid (raster layer) by using a spatial query, and then updating the underlying cell values with a user specific value.

This has been integrated as a core feature in Map Suite therefore it can be used in the web or desktop products. Continue reading

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Find what’s nearby by using Distance Queries

In addition to spatial querying GIS developers should also consider adding distance querying functionality to allow users to make spatial decisions. In mapping applications it can be useful to find features within a certain distance. For example, let’s say you want to find the number of gas stations that are within a given distance from your location. Distance querying can help you answer such questions.

Map Suite offers a couple different Distance Query APIs to help you build your application including:

• GetFeaturesNearestTo – finds the nearest feature from your location. Continue reading

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Add Spatial Querying Capabilities to Your Maps

Have you considered using GIS to make spatial decisions? Spatial querying is a powerful tool that helps you make decisions based on geographic relationships between different features. You might be wondering why you would want to use spatial queries. Some good examples of spatial querying might be the need to know the coverage area for a Wi-Fi system or the proximity of possible hazardous materials to schools so that plans can be made accordingly and much more.

There are several types of spatial queries available to you:

  • Within – Selects features that the querying feature fully contains.
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