Nhgis.org - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
72% 
Page quality
51% 
Page structure
79% 
Link structure
71% 
Server
86% 
External factors
100% 
SEO Score
Response time
1.17 s
File size
31.40 kB
Words
390
Media files
4
Number of links
59 internal / 36 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
IPUMS NHGIS | National Historical Geographic Information System
The page title should be shorter than 580 pixels. It is 601 pixels long. Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.nhgis.org/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
GeneratorDrupal 10 (https://www.drupal.org)
MobileOptimizedwidth
HandheldFriendlytrue
viewportwidth=device-width, initial-scale=1.0
langen
charsetutf-8

Automatically check nhgis.org including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Page quality

Content
(Critically important)
Only 2 paragraph/s was/were found on this page.
There are only 390 words on this page. Good pages should have about 800 words of useful content.
19.7% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 13.13 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1.0" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 8 tags for this page.
Image SEO
(Somewhat important)
1 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
...c/site-logo/logo-NHGIS.png?itok=1I6ii_oHNo alt attribute provided
assets.ipums.org/_img/logo-NICHD.pngEunice Kennedy Shriver National Institute of Child Health and Human Development
https://assets.ipums.org/_img/logo-NSF.pngNational Science Foundation
https://assets.ipums.org/_img/logo-UofM.pngUniversity of Minnesota

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H2 Main navigation
H2 Download U.S. Census Data Tables & Mapping Files
H2 Access Our Data
H2 What is IPUMS?
H2 Related Links
H2 Supported By
H3 Start Here:
H3 NHGIS News
H3 IPUMS Projects
Some anchor texts are used more than once.
There are 1 links with a trivial anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (36) on this page.

Found links on this page

LinkAttributesAnchor text
https://www.nhgis.org/Anchor Skip to main content
https://www.ipums.org/External Subdomain ipums.org
https://www.nhgis.org/No Text
https://nhgis.org/NHGIS
https://geomarker.ipums.org/External Subdomain Geomarker
https://www.nhgis.org/Home
http://data2.nhgis.org/main/nhgisNew window External Subdomain Select Data
https://data2.nhgis.org/downlo...New window External Subdomain My Data
/contact-us/contact-informationSupport
https://www.nhgis.org/Anchor Menu
/about-ipums-nhgisAbout
A-TITLE About IPUMS NHGIS
https://uma.pop.umn.edu/nhgis/...New window External Subdomain Register
https://makingagift.umn.edu/gi...New window External Subdomain Donate to NHGIS
http://data2.nhgis.org/main/nhgisNew window External Subdomain Browse and Select Data
https://data2.nhgis.org/downlo...New window External Subdomain Download or Revise My Data
https://developer.ipums.org/New window External Subdomain API
https://tech.popdata.org/ipums...New window External Subdomain Access in R
https://ipumspy.readthedocs.io...New window External Subdomain Access in Python
/geographic-crosswalksGeographic Crosswalks
/user-resources/environmental-...Environmental Summaries
/privacy-protected-2010-census...Privacy-Protected Demo Data
A-TITLE Privacy-Protected 2010 Census Demonstration Data
/sabins-school-areasSABINS School Areas
/annual-tract-estimatesAnnual Tract Data
A-TITLE Annual Estimates of Census Tract Characteristics
/data-availabilityData Availability
/overview-nhgis-datasetsOverview of Datasets
A-TITLE Overview of NHGIS Datasets
/tabular-data-sourcesTabular Data Sources
/time-series-tablesTime Series Tables
https://www.nhgis.org/gis-filesGIS Files
/revision-historyRevision History
A-TITLE Add item re: 1970 county-level data for DC
/frequently-asked-questions-faqFAQ
A-TITLE Frequently Asked Questions
/user-resources/users-guideUser Guide
https://forum.ipums.org/c/nhgisNew window External Subdomain User Forum
/citation-and-use-nhgis-dataCiting IPUMS NHGIS
A-TITLE Citation and Use of NHGIS Data
/research/ipums-bibliographyIPUMS Bibliography
/user-resources/project-descri...Trivial anchor text
Read more
http://data2.nhgis.org/main/nhgisExternal Subdomain Get Data
https://www.ipums.org/External Subdomain Learn more about IPUMS
https://www.nhgis.org/newsFirst Release of 1970 Block Boundaries
https://www.nhgis.org/newsExpanded Ability to Get Tables Only for Selected States
https://www.nhgis.org/newsNew Python Tools to Access NHGIS
https://www.nhgis.org/news2023 ACS 5-Year Summary File, Time Series Extensions & GIS Boundary Files
https://www.nhgis.org/newsLand Cover Summaries for More Levels & Years, Through 2021
https://www.nhgis.org/newsSeveral Crosswalk Updates Including New Tract-to-Tract Crosswalks
https://www.nhgis.org/newsWebinar & Blog Post on Accessing NHGIS in R
https://www.nhgis.org/newsMore News...
https://usa.ipums.org/External Subdomain usa
https://cps.ipums.org/External Subdomain cps
https://international.ipums.org/External Subdomain international
https://globalhealth.ipums.org/External Subdomain global health
https://www.nhgis.org/Subdomain nhgis
https://ihgis.ipums.org/External Subdomain ihgis
https://timeuse.ipums.org/External Subdomain time use
https://healthsurveys.ipums.org/External Subdomain health surveys
https://highered.ipums.org/External Subdomain higher ed
http://www.nichd.nih.gov/External Subdomain IMG-ALT Eunice Kennedy Shriver National Institute of Child Health and Human Development
https://www.nsf.gov/External Subdomain IMG-ALT National Science Foundation
http://www.umn.edu/External Subdomain IMG-ALT University of Minnesota
https://www.nhgis.org/Text duplicate Home
https://data2.nhgis.org/mainNew window External Subdomain Data
http://ipums.org/External IPUMS
http://www.umn.edu/External Subdomain Text duplicate University of Minnesota
/about-ipums-nhgisText duplicate About
A-TITLE About IPUMS NHGIS
https://www.nhgis.org/nhgis-staffNHGIS Staff
https://www.nhgis.org/nhgis-newsNHGIS News
/research/related-sitesRelated Sites
/ipums-nhgis-terms-useTerms of Use
https://uma.pop.umn.edu/nhgis/...New window External Subdomain Text duplicate Register
https://makingagift.umn.edu/gi...New window External Subdomain Text duplicate Donate to NHGIS
http://data2.nhgis.org/main/nhgisNew window External Subdomain Text duplicate Browse and Select Data
https://data2.nhgis.org/downlo...New window External Subdomain Text duplicate Download or Revise My Data
https://developer.ipums.org/New window External Subdomain Text duplicate API
https://tech.popdata.org/ipums...New window External Subdomain Text duplicate Access in R
https://ipumspy.readthedocs.io...New window External Subdomain Text duplicate Access in Python
/geographic-crosswalksText duplicate Geographic Crosswalks
/user-resources/environmental-...Text duplicate Environmental Summaries
/privacy-protected-2010-census...Text duplicate Privacy-Protected Demo Data
A-TITLE Privacy-Protected 2010 Census Demonstration Data
/sabins-school-areasText duplicate SABINS School Areas
/annual-tract-estimatesText duplicate Annual Tract Data
A-TITLE Annual Estimates of Census Tract Characteristics
/data-availabilityText duplicate Data Availability
/overview-nhgis-datasetsText duplicate Overview of Datasets
A-TITLE Overview of NHGIS Datasets
/tabular-data-sourcesText duplicate Tabular Data Sources
/time-series-tablesText duplicate Time Series Tables
/1990-block-data-standardized-...1990 Block Data Standardized to 2010 Geography
/2000-block-data-standardized-...2000 Block Data Standardized to 2010 Geography
https://www.nhgis.org/gis-filesText duplicate GIS Files
/1980-block-boundaries1980 Block Boundaries
/1970-block-boundaries1970 Block Boundaries
/documentation/gis-data/place-...Place Points
/revision-historyText duplicate Revision History
A-TITLE Add item re: 1970 county-level data for DC
/frequently-asked-questions-faqText duplicate FAQ
A-TITLE Frequently Asked Questions
/user-resources/users-guideText duplicate User Guide
/mapping/mapping-optionsMapping Options
https://forum.ipums.org/c/nhgisNew window External Subdomain Text duplicate User Forum
/citation-and-use-nhgis-dataText duplicate Citing IPUMS NHGIS
A-TITLE Citation and Use of NHGIS Data
/research/ipums-bibliographyText duplicate IPUMS Bibliography

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.nhgis.org/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is slow (1.17 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.
The file size of the HTML document is fine (31 kB).

HTTP Response Header

NameValue
servernginx
dateSat, 22 Mar 2025 16:44:57 GMT
content-typetext/html; charset=UTF-8
content-length8153
cache-controlmax-age=2764800, public
x-drupal-dynamic-cacheMISS
content-languageen
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
expiresSun, 19 Nov 1978 05:00:00 GMT
last-modifiedFri, 21 Mar 2025 22:23:28 GMT
etag"1742595808"
varyCookie,Accept-Encoding
x-generatorDrupal 10 (https://www.drupal.org)
x-drupal-cacheMISS
content-encodinggzip
x-request-idv-1cc14f14-06a3-11f0-8c68-e380d5387b56
x-ah-environmentprod
age66089
viavarnish
x-cacheHIT
x-cache-hits5931
accept-rangesbytes
statuscode200
http_versionHTTP/2

External factors

This website has excellent links from other websites.
This page has backlinks from 2,108 referring domains.
This page has 107,555 backlinks.
This page has backlinks from 722 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register/
Disallow: /user/password/
Disallow: /user/login/
Disallow: /user/logout/
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password/
Disallow: /index.php/user/register/
Disallow: /index.php/user/login/
Disallow: /index.php/user/logout/
# disallow query strings
User-agent: *
Disallow: /*?*

Similar sites

Search preview

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
NHGIS63%Check
IPUMS NHGIS61%Check
ipums56%Check
NATIONAL52%Check
HISTORICAL51%Check
Information System51%Check
NATIONAL HISTORICAL51%Check
National Historical Geographic Information51%Check
Historical Geographic Information System51%Check
Geographic50%Check
Show more keywords and terms

Automatically check nhgis.org including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

Contact | Privacy

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions