Texas Survey System (TXSS): How Texas Describes Land Without PLSS

Quick Answer: The Texas Survey System (TXSS) describes land using Abstract numbers, Block & Section references, and Survey-name descriptions — not townships, ranges, and sections. Texas is the only US state that never adopted PLSS, because it kept its own General Land Office when it joined the Union in 1845.

If you've ever looked up a Texas oil-and-gas lease, ranch deed, or pipeline right-of-way, you've probably noticed the legal description looks nothing like a Wyoming or Oklahoma one. No "T4N R5E," no Section 14, no Mount Diablo Meridian. Instead you get something like A-123 Reeves County, TX or Block 5, Sec 14, T&P Survey.

This guide explains why Texas does it differently — and how to read, write, and convert TXSS descriptions.

Why Texas Is the One Exception

Every other US state west of the Appalachians uses the Public Land Survey System (PLSS) — the rectangular grid of 6×6 mile townships established by the Land Ordinance of 1785. Texas does not.

The reason is historical:

• 1836–1845 — The Republic of Texas was an independent country. It surveyed and granted its own public land through its own General Land Office (GLO).
• December 29, 1845 — Texas joined the Union, but under unique terms: it kept ownership of its remaining public land instead of ceding it to the federal government.
• Result — When the rest of the United States was surveyed into PLSS townships, Texas continued issuing land grants through its own GLO using the surveys it had already done.

Modern Texas land descriptions still trace back to those original surveys — many of them railroad land grants from the 1850s–1880s, others Spanish or Mexican leagues and labors from before independence.

The Three Shapes of a TXSS Description

A Texas legal description shows up in one of three shapes depending on the region:

1. Abstract-only

A-123 Reeves County, TX
Abstract 250, Bowie County

The abstract number is a unique ID the Texas GLO assigned to each original land grant within a county. Counties number their abstracts independently — A-123 in Reeves County is a different parcel than A-123 in Bowie County.

Used most often in: East Texas (Piney Woods), the Coastal Bend, and counties where original surveys were small and irregular.

2. Block & Section

Block 5, Sec 14, T&P Survey, Reeves County
Blk 13 Sec 9 H&TC Survey, Loving County

In West Texas — the Permian Basin, the Trans-Pecos, and the Panhandle — railroads received massive land grants in the late 1800s and surveyed them into blocks containing numbered sections. The block-and-section grid resembles PLSS visually, but each block belongs to a specific railroad survey (T&P, H&TC, GC&SF, etc.) rather than a principal meridian.

Used most often in: Permian Basin oil and gas country, plus North Texas and the Panhandle.

3. Survey-name

John Smith Survey, Bexar County
W. H. Jenkins Survey, Karnes County

In South Texas — including the Rio Grande Valley and the original Spanish/Mexican land grants — many descriptions reference the survey by the name of the person it was originally granted to. These are often leagues (~4,428.4 acres) or labors (~177.1 acres) — units inherited from the Spanish colonial era.

Used most often in: South Texas, the Rio Grande Valley, and counties along the historic Camino Real.

The Four RRC Regions

Texas is divided into four regions by the Railroad Commission of Texas (RRC), and each tends to favor a different TXSS convention:

You won't always see the same convention everywhere within a region — but knowing which is common helps when you're trying to parse an unfamiliar description.

Common Railroad Surveys

In Block & Section country, the survey name is usually a railroad. The biggest grants went to:

How TXSS Differs from PLSS

For PLSS users coming over to Texas, the conceptual map looks like this:

A PLSS section is always 640 acres (give or take correction). A Texas abstract or survey can be anywhere from a few acres to tens of thousands, depending on the original grant.

For a deeper reference on each shape, see Texas Abstracts, Blocks, and Surveys.

All 254 Counties Are Covered

Texas has more counties than any other US state — 254 — and Township America's TXSS resolver covers all of them:

• East Texas (Bowie, Cass, Harrison, etc.) — predominantly Abstract-only
• Central Texas (Travis, Bexar, McLennan, etc.) — mixed conventions
• West Texas (Reeves, Loving, Pecos, etc.) — Block & Section
• South Texas (Cameron, Hidalgo, Kleberg, etc.) — Survey-name

Each county has its own converter hub under /texas/counties/{county-slug} — useful for landmen, title agents, and surveyors who work a specific county regularly.

Spanish and Mexican Leagues and Labors

In South Texas, many surveys predate Texas independence and use units from Spanish colonial measurement:

• League (Legua) — ~4,428.4 acres (the standard cattle-ranching grant unit)
• Labor — ~177.1 acres (the standard farming grant unit, 1/25 of a league)

These show up most often as [Surname] Survey, [County] descriptions. The polygon is named after the original grantee, not surveyed into smaller geometric blocks.

Converting a TXSS Description to GPS Coordinates

Township America's converter accepts every TXSS shape transparently — no Texas mode, no separate input:

1. Go to app.townshipamerica.com
2. Paste any TXSS description (e.g., A-123 Reeves County, TX)
3. Get the centroid, polygon, and acreage instantly

For a detailed walkthrough, see Convert Texas Abstract to GPS Coordinates.

For programmatic access via the REST API, see Township America API.

Open the Texas converter →

For teams, batch jobs, and API access

If you're converting hundreds of Texas descriptions a month, sharing projects with a team, or pulling abstract and survey data into ArcGIS, Excel, or your own application, see Township America pricing. Plans start at $10/mo. Pro+ ($100/mo) adds polygon export (Shapefile, GeoJSON, KML), MCP server, and batch up to 10K rows. Standalone REST API subscriptions are sold separately. Business ($40/user/mo) adds team workspaces, RBAC, and SSO.

Frequently Asked Questions

Why doesn't Texas use the township and range system? When Texas joined the Union in 1845, it kept ownership of its public land and continued issuing grants through its own General Land Office. PLSS was never extended into Texas.

What's the difference between an abstract and a survey? An abstract is a unique GLO-assigned identifier for a parcel (one number per parcel per county). A survey is the originally granted tract — often a railroad grant or Spanish/Mexican land grant — which may contain multiple abstracts.

Can a single county use multiple TXSS conventions? Yes. Reeves County, for example, uses both Block & Section (for the T&P railroad lands) and Abstract-only (for smaller grants). Township America's parser handles all of them in the same county.

Are TXSS descriptions case-sensitive? No. The parser accepts T&P, t&p, T & P, Texas and Pacific, and many variants — all normalize to the canonical survey name.

Does Texas Survey land have a polygon I can download? Yes — Pro+ subscribers can export the polygon as Shapefile, GeoJSON, or KMZ for any TXSS description, same as a PLSS section.

How do I look up a Texas abstract programmatically? Use the REST API with POST /api/convert and a TXSS description like A-123 Reeves County, TX. See Township America API for endpoint reference and authentication.