Company lists · Data refreshed September 2026

Top 25 Environmental mapping companies based in the United States

Name: Environmental mapping companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 626 companies tracked

RevenueBase identified 626 environmental mapping companies headquartered in the United States as of September 2026 and tracks 17,206 professional contacts across them, including 8,855 with verified work emails. Houston is the largest hub.

This list covers environmental mapping companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

626Companies

17,206Contacts tracked

8,855Verified emails

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The 25 largest environmental mapping companies based in the United States

Ranked by team size

Top 25 of 626 environmental mapping companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to environmental mapping companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	ESRI	Partial evidence	Redlands, CA, United StatesHQ checked Sep 19, 2026	5,001-10,000	6,429 contacts →
	Partial evidence “Esri is the global market leader in geographic information system (GIS) software, location intelligence, and mapping.” Source: RevenueBase Database · checked Sep 19, 2026
2	SAM	Indirect evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,290 contacts →
	Indirect evidence “SAM has built a reputation as a trusted, knowledgeable, and innovative partner.” Source: RevenueBase Database · checked Sep 19, 2026
3	Timmons Group	Partial evidence	Richmond, VA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,066 contacts →
	Partial evidence “Timmons Group is an engineering & technology firm specializing in civil, environmental, GIS, and surveying services to clients across the US.” Source: RevenueBase Database · checked Sep 19, 2026
4	Nv5 Geospatial	Indirect evidence	Saint Petersburg, FL, United StatesHQ checked Sep 19, 2026	1,001-5,000	682 contacts →
	Indirect evidence “NV5 provides engineering, technology, and consulting services for both public and private sectors.” Source: RevenueBase Database · checked Sep 19, 2026
5	Contract Land Staff	Partial evidence	Sugar Land, VA, United StatesHQ checked Sep 19, 2026	1,001-5,000	640 contacts →
	Partial evidence “As the largest group of land service companies in the nation, the CLS Companies provide a combination of land services and sciences to support and sustain our environment and…” Source: RevenueBase Database · checked Sep 19, 2026
6	Geospatial Systems	Indirect evidence	Rochester, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	314 contacts →
	Indirect evidence “ITT's Geospatial Systems Division is now part of Exelis Inc.” Source: RevenueBase Database · checked Sep 19, 2026
7	Encompass Energy Services, LLC	Indirect evidence	The Woodlands, TX, United StatesHQ checked Sep 19, 2026	501-1,000	298 contacts →
	Indirect evidence “Encompass Services is a professional Survey, Land/ROW, and GIS firm serving the energy, land management, transportation, and infrastructure industries.” Source: RevenueBase Database · checked Sep 19, 2026
8	Sanborn	Partial evidence	Colorado Springs, CO, United StatesHQ checked Sep 19, 2026	51-200	257 contacts →
	Partial evidence “The Sanborn Map Company Inc.(Sanborn) is an innovator in the modern geospatial industry, delivering state-of-the-art mapping, visualization and 3D solutions for customers…” Source: RevenueBase Database · checked Sep 19, 2026
9	Blew & Associates, P.A	Indirect evidence	Fayetteville, AR, United StatesHQ checked Sep 19, 2026	201-500	189 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
10	Transglobal Services LLC	Strong evidence	Fort Worth, TX, United StatesHQ checked Sep 19, 2026	201-500	166 contacts →
	Strong evidence “Transglobal Services, LLC (TGS) provides surveying, land services, GIS, mapping, and environmental services to the construction industry.” Source: RevenueBase Database · checked Sep 19, 2026
11	Southeastern Surveying And Mapping Corp	Partial evidence	Orlando, FL, United StatesHQ checked Sep 19, 2026	51-200	151 contacts →
	Partial evidence “Founded in Orlando in 1972, SSMC is an independent, 100% employee-owned geospatial services firm providing professional surveying and mapping, subsurface utility engineering…” Source: RevenueBase Database · checked Sep 19, 2026
12	G.E.C., Inc. GEC	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 19, 2026	51-200	134 contacts →
	Indirect evidence “Established in 1986, GEC is a Louisiana-based engineering firm providing complete and proficient services from planning to implementation for private and public clients.” Source: RevenueBase Database · checked Sep 19, 2026
13	Photo Science INC	Partial evidence	Lexington, KY, United StatesHQ checked Sep 19, 2026	51-200	118 contacts →
	Partial evidence “Founded in 1974, Photo Science is a geospatial solutions provider specializing in aerial acquisition (imagery & LiDAR), data collection/processing, photogrammetric mapping, mobile…” Source: RevenueBase Database · checked Sep 19, 2026
14	Firmatek	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 19, 2026	51-200	99 contacts →
	Indirect evidence “We believe in the democratization of geospatial data, putting actionable insights into the hands of more people to eliminate doubt, encourage collaboration and promote supreme…” Source: RevenueBase Database · checked Sep 19, 2026
15	Spatial Informatics Group, LLC	Indirect evidence	Pleasanton, CA, United StatesHQ checked Sep 19, 2026	51-200	95 contacts →
	Indirect evidence “SIG is built on a foundation of academic rigor and breadth, professional effectiveness, and technological advances.” Source: RevenueBase Database · checked Sep 19, 2026
16	Intermap Technologies, INC	Indirect evidence	Englewood, CO, United StatesHQ checked Sep 19, 2026	51-200	87 contacts →
	Indirect evidence “Not a skilled geospatial analyst?” Source: RevenueBase Database · checked Sep 19, 2026
17	JMT Technology Group	Indirect evidence	Hunt Valley, MD, United StatesHQ checked Sep 19, 2026	51-200	86 contacts →
	Indirect evidence “JMT Technology Group is a dynamic geospatial and software development services provider that assists government and private sector markets to solve complex business challenges…” Source: RevenueBase Database · checked Sep 19, 2026
18	BEM Systems, INC	Partial evidence	Madison, NJ, United StatesHQ checked Sep 19, 2026	11-50	78 contacts →
	Partial evidence “Founded in 1990, BEM Systems, Inc.(BEM) is an environmental, engineering, and information management firm specializing in remedial investigations and environmental management.” Source: RevenueBase Database · checked Sep 19, 2026
19	Dpra INC	Partial evidence	Knoxville, TN, United StatesHQ checked Sep 19, 2026	51-200	78 contacts →
	Partial evidence “DPRA specializes in developing the most advanced and creative solutions to complex logistical, technical, environmental, and management problems.” Source: RevenueBase Database · checked Sep 19, 2026
20	Mason, Bruce & Girard, Inc. Mb&g	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	51-200	77 contacts →
	Partial evidence “Since 1921 Mason, Bruce & Girard, Inc.(MB & G) has provided forestry, environmental, and geospatial services to public and private clients.” Source: RevenueBase Database · checked Sep 19, 2026
21	GIS Surveyors	Indirect evidence	Poway, CA, United StatesHQ checked Sep 19, 2026	51-200	72 contacts →
	Indirect evidence “GIS Surveyors is pioneering new ways of integrating GIS and land surveying into new and unique solutions for our clients.” Source: RevenueBase Database · checked Sep 19, 2026
22	Riverside Technology, INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 19, 2026	201-500	72 contacts →
	Indirect evidence “Riverside has been acquired by Consolidated Safety Services Incorporated, please visit us at Riverside is an internationally recognized engineering, science, and information…” Source: RevenueBase Database · checked Sep 19, 2026
23	Windsor Solutions	Partial evidence	Tigard, OR, United StatesHQ checked Sep 19, 2026	51-200	71 contacts →
	Partial evidence “Windsor Solutions is an IT consulting firm that provides industry-specific information systems for environmental and government agencies.” Source: RevenueBase Database · checked Sep 19, 2026
24	Ddms, INC	Partial evidence	St Paul, MN, United StatesHQ checked Sep 19, 2026	51-200	70 contacts →
	Partial evidence “de maximis Data Management Solutions (ddms) is a service-oriented company that provides world-class environmental data management, data validation, visualization and enterprise…” Source: RevenueBase Database · checked Sep 19, 2026
25	Environmental Services, Inc., A Terracon Company	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 19, 2026	51-200	70 contacts →
	Partial evidence “Environmental Services, Inc.(ESI) is a leading full service environmental consulting firm with national and international experience.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: environmental mapping companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names environmental mapping companies.
Partial evidence: Its own public description names part of environmental mapping companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental mapping companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 626 environmental mapping companies based in the United States

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Environmental mapping companies based in the United States at a glance

As of Sep 19, 2026

51.5%Verified-email coverage

27.5Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

397

11-50

159

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 626 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among environmental mapping companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “environmental mapping companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names environmental mapping companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among environmental mapping companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 8,855 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names environmental mapping companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many environmental mapping companies are there based in the United States?

RevenueBase identified 626 environmental mapping companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

ESRI, headquartered in Redlands, tops this list with the largest team on record.

Which city has the most environmental mapping companies?

Houston leads with 15 headquartered companies, followed by Portland (11) and Denver (10).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 8,855 verified decision-maker contacts tracked across these 626 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.