4 sec in total
1.1 sec
2.6 sec
227 ms
Click here to check amazing Open Sea Map content for Singapore. Otherwise, check out these important facts you probably never knew about openseamap.org
OpenSeaMap - die freie Seekarte, nach dem Wiki-Prinzip, auf PC, Garmin, Lowrance.
Visit openseamap.orgWe analyzed Openseamap.org page load time and found that the first response time was 1.1 sec and then it took 2.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
openseamap.org performance score
name
value
score
weighting
Value6.3 s
3/100
10%
Value10.5 s
0/100
25%
Value9.0 s
14/100
10%
Value140 ms
95/100
30%
Value0.003
100/100
15%
Value6.4 s
60/100
10%
1129 ms
112 ms
184 ms
186 ms
185 ms
Our browser made a total of 74 requests to load all elements on the main page. We found that 66% of them (49 requests) were addressed to the original Openseamap.org, 32% (24 requests) were made to Openlayers.org and 1% (1 request) were made to Openstreetmap.org. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Openseamap.org.
Page size can be reduced by 71.0 kB (30%)
237.1 kB
166.1 kB
In fact, the total size of Openseamap.org main page is 237.1 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. 20% of websites need less resources to load. Images take 157.7 kB which makes up the majority of the site volume.
Potential reduce by 45.5 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 11.1 kB, which is 21% 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 45.5 kB or 84% of the original size.
Potential reduce by 5.0 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. Open Sea Map images are well optimized though.
Potential reduce by 3.7 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 3.7 kB or 84% of the original size.
Potential reduce by 16.8 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. Openseamap.org needs all CSS files to be minified and compressed as it can save up to 16.8 kB or 81% of the original size.
Number of requests can be reduced by 16 (26%)
61
45
The browser has sent 61 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Open Sea Map. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.
index.php
1129 ms
stylesheet_e005412df9.css
112 ms
style.css
184 ms
javascript_dd82474708.js
186 ms
map.css
185 ms
OpenLayers.js
62 ms
OpenStreetMap.js
156 ms
OpenLayers.js
29 ms
grey_eeeeee.gif
93 ms
OpenSeaMapLogo_200.png
93 ms
FB_FindUsOnFacebook-114.png
95 ms
somerights20.png
95 ms
csm_Opencpn_logo_766b931b24.png
96 ms
csm_Lowrance-Simrad-BuG_2c82043b49.jpg
185 ms
csm_Garmin_GPSmap7015_6546dd2e68.jpg
184 ms
csm_OpenSeaMap-Logger2-1_9634bac1fd.jpg
187 ms
csm_IG_weiss_56fb12e4c1.jpg
187 ms
csm_Yacht_00534c5c90.jpg
187 ms
csm_Android_robot.svg_ea9d675964.png
187 ms
csm_HydroInternational_8927095911.jpg
275 ms
csm_Light_dark_01_2987491948.jpg
274 ms
csm_Schweizerflagge_6c7ae22659.jpg
278 ms
csm_Kreuz_Himmel_a8680be34d.jpg
276 ms
csm_Garmin-GPSmap526-1-kl_cff8072f38.jpg
276 ms
csm_boot_button_150_01_8e29c84637.png
277 ms
csm_WreckIcon_63081da882.png
365 ms
csm_AIS-Teaser_4a5db586c1.jpg
366 ms
csm_GEBCO-Wassertiefe-Welt-kl_357b0bba5e.jpg
367 ms
csm_Wetter_Isobaren_780e01e137.jpg
369 ms
csm_Hafenwetter_Meteogramm_4a7ba5eff5.png
371 ms
csm_SeaClearWannsee_03_9cc23a08df.png
374 ms
csm_messe_30901ba652.png
455 ms
csm_Google-Panorama-Warnemuende_9b3e37911d.jpg
456 ms
csm_Hispaniola-Haiti-Erdbeben-klein_01_275eabbbf7.jpg
457 ms
csm_Marina-Icon_8f5db729e5.png
456 ms
csm_wt_logo_0_5842bf6cd0.png
457 ms
csm_EUROPE_DIGEST_LOGO__400x180_86827938e2.jpg
458 ms
csm_MS_Sewol_Track-1_8f8a3673b0.jpg
546 ms
csm_dhyg-Logo_e9584c2871.png
546 ms
csm_iPhone_8090bac02b.jpg
548 ms
csm_GIS-Logo_0016758520.jpg
546 ms
csm_Bing-Teaser_8abcedaac1.jpg
548 ms
csm_Wikipedia_Logo_ohne_4b001b17d0.jpg
549 ms
csm_Zirkel_und_Karte_120_d0a734788c.jpg
637 ms
csm_JOSM-Plugin-klein_01_9588795ec5.jpg
550 ms
csm_Flag_Griechenland_120px_8de66fd41a.png
550 ms
csm_l_chaosknoten_1_eddddf031b.png
549 ms
csm_Wetter_Windpfeile_c6f558e9cb.jpg
549 ms
csm_Download-Layer_Ostsee_92ef260e4a.png
549 ms
csm_Harbour56_01_aa8e73e292.png
549 ms
csm_YouTubeRalf2_01_842b5554a3.jpg
548 ms
csm_Titanic91_11_D_0b8cc60478.jpg
637 ms
style.css
30 ms
layer-switcher-maximize.png
5 ms
layer-switcher-minimize.png
6 ms
north-mini.png
8 ms
west-mini.png
9 ms
east-mini.png
6 ms
south-mini.png
9 ms
zoom-plus-mini.png
15 ms
slider.png
16 ms
zoom-minus-mini.png
9 ms
style.css
8 ms
layer-switcher-maximize.png
17 ms
layer-switcher-minimize.png
17 ms
east-mini.png
15 ms
north-mini.png
18 ms
west-mini.png
16 ms
south-mini.png
14 ms
zoom-minus-mini.png
14 ms
zoombar.png
12 ms
zoom-plus-mini.png
12 ms
slider.png
12 ms
zoombar.png
3 ms
openseamap.org accessibility score
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
Image elements do not have [alt] attributes
Links do not have a discernible name
openseamap.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
openseamap.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
DE
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Openseamap.org can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it does not match the claimed English language. Our system also found out that Openseamap.org 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.
openseamap.org
Open Graph description is not detected on the main page of Open Sea Map. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: