Files with sidx extension are used by the SharpMap program. They store some kind of spatial index data.
There is one other file type using
the SIDX file extension!
.sidx - StuffIt archive index file
Detailed description
Software that open sidx file
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What is sidx file? How to open sidx files?
The sidx file extension is associated with the SharpMap mapping library that provides access to many types of GIS data. The .sidx file contains spatial index that is used to optimize spatial queries.
The default software associated to open sidx file:
SharpMap 
SharpMap is mapping library for use in web and desktop applications. It provides access to many types of GIS data, enables spatial querying of that data, and renders maps.
Help how to open:
This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.
How to convert:
As far as we know, this .sidx file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
List of software applications associated to the .sidx file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open sidx file, edit sidx file, convert sidx file, view sidx file, play sidx file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting sidx files.
Programs that can create sidx file - SharpMap spatial index file
Programs supporting the exension sidx on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about SharpMap for create sidx file action.
Unspecified and all other actions for computer programs working with sidx file - SharpMap spatial index file
Click on the software link for more information about SharpMap. SharpMap uses sidx file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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