Applications & Utilities

Web based tools and utilities for accessing, visualizing, and interacting with geospatial information.

The Information Services (IS) section of TNRIS maintains the digital data library and public accessibility to its contents. These include's DataHub and Historical Aerial Database API. Additionally, the IS section produces and maintains numerous web applications, tools, utilities, and code packages which leverage geospatial information for the public benefit. The IS section is a strong proponent of open source development and the majority of supporing code for their products are available on Github.

Flood Viewer

Flood Viewer Screenshot

Texas is no stranger to flood. With its diverse geography and extensive, hurricane-prone coastline, the state frequently leads the nation not only in structural damage but also in loss of lives related to flooding events. This application provides users current flood levels across the state by mapping Flood Gauges, lake water elevations, and weather information. Users can create an account and subscribe to receive SMS text message alerts when gauges reach dangerous flood levels.

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2017 Interactive State Water Plan

2017 ISWP Screenshot

This website is an integral part of the 2017 State Water Plan that lets water users statewide take an up-close look at data in the 2017 State Water Plan and how water needs change over time. The user-friendly website, which is also easily viewed on most mobile devices, now shows:

  • projected water demands,
  • existing water supplies,
  • the relative severity and projected water needs (potential shortages),
  • the water management strategies recommended to address potential shortages, and
  • recommended capital projects and their sponsors.

over the next 50 years in geographical and tabular forms. Note that all county-based water user group categories are mapped to the same location at the center of each county.

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Geospatial Emergency Management Support System (GEMSS)

GEMSS2 Screenshot

The Geospatial Emergency Management Support System (GEMSS) was developed using the Hazard Mitigation Grant Program (HMGP) managed by the Texas Division of Emergency Management (TDEM). It is the first coordinated effort to create an infrastructure in which data collected during and after major disasters can be integrated with real-time and existing geospatial data.

GEMSS allows the data to be presented in a useful and compelling manner, without requiring specialized knowledge of GIS data or applications. GEMSS is designed to become the public domain tool to support emergency activities.

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Lake Gallery (coming soon)

Lake Gallery Screenshot

This web application serves as an interactive insight into the historical narrative of the lakes and reservoirs in the State of Texas for the purpose of general public education and understanding about the precious water resources of Texas. It is our hope to relay awareness and historical knowledge of the infinitely significant water bodies utilized by the citizens of Texas daily. The Texas Lake Gallery focuses on the water sources managed by the TWDB.

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ASCII Wallpaper Screenshot

Texas ASCII art! Use this generator to create ASCII desktop wallpaper quality images on the fly and download them instantly. Art images are created from Texas statewide and county geospatial datasets.

TNRIS Alexa Skill

Alexa Skill Logo

Enable the free TNRIS Alexa Skill on your Amazon Echo! The skill provides users with the ability to verbally interact with the Historical Aerial archive database by asking about what years and counties are available.


Texas Geojson Screenshot

Need quick and easy access to the Texas statewide and county boundaries in your application? This package provides these geospatial boundaries in both geojson and topojson formats.



Github Octocat Logo

Check out the TNRIS Organization on Github to see the code behind many of our applications and utilities. Be sure to 'Star' the repositories you like!

Node Package Manager (NPM)

NPM Logo

Check out the TNRIS account on the Node Package Manager (NPM) to see what NodeJS packages we have shared for use in your javascript programs and applications.



Classic Data Catalog pouncing tiger

GISCAT (Geospatial Information System Catalog) was originally created in 1996 by former GIS Coordinator Andrew Poth as the mechanism to organize all of TNRIS's data into a central location. Take a look at the resourceful ways we organized data in past decades and to see how far we've come. GIS Cat always claws back!