Surveys, Leagues, and Labors — Spanish and Mexican Land Grants in TXSS

In South Texas, parts of Central Texas, and the Coastal Bend, many legal descriptions reference land by the name of the original surveyor or grantee, with no abstract number, no block, no section. A typical reference looks like:

John Smith Survey, Bexar County
W. H. Jenkins Survey, Karnes County
Maria de los Reyes Survey, Cameron County

These are survey-name descriptions. The "survey" is the original land grant tract, and the polygon is defined by the grant's metes-and-bounds boundary — not by a regular grid. Many of these grants predate Texas independence and use units of measurement inherited from the Spanish colonial era: leagues, labors, and varas.

This article explains how survey-name descriptions work, the units of measurement involved, the colonial history behind them, and how to read and convert them.

What a "Survey" Means in TXSS

In TXSS, a survey is the original land grant tract. The grant was named after one of:

• The original grantee — the person, family, or empresario the land was patented to
• The original surveyor — in some cases, the person who walked the boundaries

For example, the "John Smith Survey, Bexar County" refers to a single named tract granted to John Smith — its polygon is whatever the original surveyor described in the field notes, however irregular.

Survey-name descriptions skip the abstract number entirely; the survey name and county uniquely identify the polygon. (Township America's resolver matches against the GLO record for that named survey within the county.)

Where Survey-Name Dominates

Three regions of Texas use survey-name as the primary TXSS convention:

South Texas / Rio Grande Valley

Counties like Cameron, Hidalgo, Starr, Zapata, Webb, Jim Hogg, Brooks, Kenedy, Willacy, and Kleberg. Many parcels here trace to Spanish and Mexican land grants — leagues granted for cattle ranching, labors granted for farming.

Coastal Bend

Counties like Nueces, San Patricio, Aransas, Refugio, Calhoun, and Victoria. Empresario contracts in the 1820s and 1830s seeded much of this land, and the resulting parcels are referenced by survey name.

Central Texas (parts)

Counties like Bexar, Karnes, Wilson, Goliad, DeWitt, and Gonzales. Mixed conventions — many parcels carry both abstract numbers and survey names, and either reference will work.

Spanish Colonial Units of Measurement

Before Texas independence in 1836, land was measured in Spanish colonial units. These units still define the size of the named-survey polygons you encounter today:

A league is the size of a standard cattle-ranching grant — roughly 4,428 acres, about 7 square miles. Spanish authorities granted leagues to families willing to settle and ranch in the frontier.

A labor is roughly 177 acres, exactly 1/25 of a league. Labors were granted for farming. Many empresario grantees received a combination — a few leagues of grazing land plus several labors of farmland.

The vara is the underlying linear unit — about 33.33 inches (~33⅓ inches). Survey field notes measure distances in varas. A league is 5,000 varas on each side; a labor is 1,000 varas on each side.

Republic of Texas and State Grants

After Texas independence in 1836, the Republic of Texas continued issuing land grants, often in leagues and labors — keeping the Spanish system in place to honor pre-independence patents and to maintain continuity. The Republic also issued grants for military service (bounty grants) and for settlement (headrights).

After statehood in 1845, the State of Texas issued additional grants under various land programs, including grants to Confederate veterans, frontier settlers, and the railroads (which is where Block & Section comes from — see Blocks and Sections).

The common thread across all Texas land grants — Spanish, Mexican, Republic, State — is that each one is named after its grantee and its polygon is defined by the original surveyor's field notes, not by a regular grid.

How a Survey-Name Reference Looks

You will see survey-name references in several forms:

The last form is common in deeds — the abstract number gives a GLO index reference, and the survey name confirms the original grantee.

Survey-Name in Deeds

A typical South Texas deed reads:

All of that certain tract or parcel of land out of the
W. H. Jenkins Survey, Abstract No. 198, Karnes County, Texas,
being more particularly described as follows: [metes and bounds calls]

The survey name and abstract identify the broader polygon; the metes-and-bounds calls describe the specific parcel within it. Conveyances are recorded in the county clerk's office, indexed by abstract number, but the survey name is the colloquial identifier most landmen and title agents actually use.

How Survey-Name Differs from Other TXSS Shapes

The Survey-name convention is essentially the historical layer of TXSS — it predates the abstract-numbered indexing system in many cases, and it carries forward the Spanish/Mexican colonial geography of grants.

Converting a Survey-Name Reference

Township America's converter accepts survey-name references the same way it accepts abstracts and Block & Section descriptions:

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

The resolver matches against the GLO record for the named survey within that county and returns centroid, polygon, and acreage. For batch and API access, see Convert Texas Abstract to GPS Coordinates.

Limits of TXSS for Colonial Grants

A few caveats about pre-Republic land grants:

1. GLO is the source of truth, but GLO's digitized polygons cover the official record. Pre-statehood grants that were never fully patented or that were superseded by later surveys may not appear in modern TXSS data.
2. Some Spanish grants overlap. Adjudication of overlapping pre-independence grants continued well into the 20th century. Modern boundaries reflect the resolved adjudication.
3. Coastal grants and bay tracts are handled separately. Where survey polygons meet state-owned tidelands, you may need to consult Bay Tract records — coastal O&G lease polygons managed by GLO. Township America covers Bay Tracts in the Pro+ API.

For most modern title and lease work, the survey-name reference + county is enough to resolve to a polygon. For the edge cases above, GLO records and county courthouse deed indexes are the authoritative sources.

Try the Texas converter →