Tools & Wizards About Us
gebco.net screenshot

Report Summary

  • 54

    Performance

    Renders faster than
    71% of other websites

  • 61

    Accessibility

    Visual factors better than
    that of 27% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

gebco.net

GEBCO - The General Bathymetric Chart of the Oceans

Page Load Speed

3.7 sec in total

First Response

218 ms

Resources Loaded

2.1 sec

Page Rendered

1.3 sec

gebco.net screenshot

About Website

Visit gebco.net now to see the best up-to-date GEBCO content for Algeria and also check out these interesting facts you probably never knew about gebco.net

The General Bathymetric Chart of the Oceans (GEBCO) aims to provide the most authoritative, publicly available bathymetry data sets for the world’s oceans.

Visit gebco.net

Key Findings

We analyzed Gebco.net page load time and found that the first response time was 218 ms and then it took 3.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

gebco.net performance score

54

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

48/100

10%

LCP (Largest Contentful Paint)

Value8.8 s

1/100

25%

SI (Speed Index)

Value4.7 s

68/100

10%

TBT (Total Blocking Time)

Value180 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0.069

96/100

15%

TTI (Time to Interactive)

Value14.9 s

8/100

10%

Network Requests Diagram

gebco.net

218 ms

www.gebco.net

462 ms

styles.css

91 ms

glide.core.min.css

181 ms

js

44 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 83% of them (35 requests) were addressed to the original Gebco.net, 5% (2 requests) were made to Apis.google.com and 5% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Gebco.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 64.5 kB (18%)

Content Size

359.2 kB

After Optimization

294.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Gebco.net main page is 359.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 202.9 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 34.0 kB

  • Original 40.6 kB
  • After minification 29.0 kB
  • After compression 6.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 11.6 kB, which is 29% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 34.0 kB or 84% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 202.9 kB
  • After minification 202.9 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. GEBCO images are well optimized though.

JavaScript Optimization

-17%

Potential reduce by 17.5 kB

  • Original 100.5 kB
  • After minification 100.5 kB
  • After compression 83.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 17.5 kB or 17% of the original size.

CSS Optimization

-85%

Potential reduce by 13.0 kB

  • Original 15.2 kB
  • After minification 5.8 kB
  • After compression 2.3 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Gebco.net needs all CSS files to be minified and compressed as it can save up to 13.0 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (13%)

Requests Now

40

After Optimization

35

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of GEBCO. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

gebco.net

gebco.net

218 ms

www.gebco.net

www.gebco.net

462 ms

styles.css

styles.css

91 ms

glide.core.min.css

glide.core.min.css

181 ms

js

js

44 ms

bundle.js

bundle.js

452 ms

addthis_widget.js

addthis_widget.js

145 ms

css

css

32 ms

matomo.js

matomo.js

372 ms

plusone.js

plusone.js

46 ms

gebco-logo.png

gebco-logo.png

329 ms

iho-logo.png

iho-logo.png

335 ms

combined_unesco_ioc_blue.png

combined_unesco_ioc_blue.png

419 ms

gebco-logo-v2.png

gebco-logo-v2.png

433 ms

select-triangle-white.svg

select-triangle-white.svg

436 ms

search-icon.png

search-icon.png

435 ms

gebco-hero.jpg

gebco-hero.jpg

517 ms

header-seabed-section.svg

header-seabed-section.svg

432 ms

gebco_120_years_logo_web.png

gebco_120_years_logo_web.png

511 ms

gebco-logo.svg

gebco-logo.svg

521 ms

home-page-grid.jpg

home-page-grid.jpg

699 ms

gebco_products.jpg

gebco_products.jpg

884 ms

seabed2030_image.jpg

seabed2030_image.jpg

887 ms

trench-section-bg.svg

trench-section-bg.svg

602 ms

gebco_2024_world_image.png

gebco_2024_world_image.png

699 ms

pacific_mapping_mtg.jpg

pacific_mapping_mtg.jpg

612 ms

wms_image.jpg

wms_image.jpg

777 ms

section-image.jpg

section-image.jpg

874 ms

e_flier.jpg

e_flier.jpg

879 ms

m_rovere.jpg

m_rovere.jpg

791 ms

s_tani.jpg

s_tani.jpg

870 ms

h_han.png

h_han.png

883 ms

r_wigley.jpg

r_wigley.jpg

1047 ms

d_millar.jpg

d_millar.jpg

964 ms

trench-footer-bg.svg

trench-footer-bg.svg

970 ms

twitter-logo.png

twitter-logo.png

974 ms

facebook-logo.png

facebook-logo.png

970 ms

bodc-logo.png

bodc-logo.png

1064 ms

font

font

61 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

7 ms

font

font

5 ms

851 ms

Accessibility Review

gebco.net accessibility score

61

Accessibility Issues

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Best Practices

gebco.net best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

gebco.net SEO score

86

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Gebco.net can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Gebco.net main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

gebco.net

Open Graph data is detected on the main page of GEBCO. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: