Louie Sanders

Louie Sanders

1609959480

Displaying Geographic Information Using Custom Map Tiles

Interactive maps are now a staple of our everyday digital life. We use them to learn of our whereabouts, plan the next trip, or review our past travels. In a professional setting, maps became priceless tools for all manner of businesses in planning, operations, and analytics.

An interactive map displays a patchwork of square tiles, each containing a small part of the complete image. A cloud-based service provides these tiles, either by retrieving them from a cache or generating them on-the-fly. The map software manages the display as if showing a continuous bitmap but operates on a tile-basis in the background. Whenever needed, the map software requests new tiles from the service and discards them when they are no longer required. This situation occurs when the user changes the zoom level or pans the map in any direction.

When zooming in or out, the map software stretches or compresses the current display while retrieving the new level’s tiles. It then overlays the new tiles on top of the old ones, providing a pleasant visual continuity.

There is nothing better than a live map example to help build your intuition of what is going on behind the scenes. Please follow the previous link and select the “Show tile borders” option. Browse the map, see how the software juggles the tiles, how it stretches them, and how it replaces and refreshes the content. When hovering each tile with the cursor, the software displays the tile’s coordinates.

#data-processing #interactive #tiles #maps

What is GEEK

Buddha Community

Displaying Geographic Information Using Custom Map Tiles
Louie Sanders

Louie Sanders

1609959480

Displaying Geographic Information Using Custom Map Tiles

Interactive maps are now a staple of our everyday digital life. We use them to learn of our whereabouts, plan the next trip, or review our past travels. In a professional setting, maps became priceless tools for all manner of businesses in planning, operations, and analytics.

An interactive map displays a patchwork of square tiles, each containing a small part of the complete image. A cloud-based service provides these tiles, either by retrieving them from a cache or generating them on-the-fly. The map software manages the display as if showing a continuous bitmap but operates on a tile-basis in the background. Whenever needed, the map software requests new tiles from the service and discards them when they are no longer required. This situation occurs when the user changes the zoom level or pans the map in any direction.

When zooming in or out, the map software stretches or compresses the current display while retrieving the new level’s tiles. It then overlays the new tiles on top of the old ones, providing a pleasant visual continuity.

There is nothing better than a live map example to help build your intuition of what is going on behind the scenes. Please follow the previous link and select the “Show tile borders” option. Browse the map, see how the software juggles the tiles, how it stretches them, and how it replaces and refreshes the content. When hovering each tile with the cursor, the software displays the tile’s coordinates.

#data-processing #interactive #tiles #maps

Why Use WordPress? What Can You Do With WordPress?

Can you use WordPress for anything other than blogging? To your surprise, yes. WordPress is more than just a blogging tool, and it has helped thousands of websites and web applications to thrive. The use of WordPress powers around 40% of online projects, and today in our blog, we would visit some amazing uses of WordPress other than blogging.
What Is The Use Of WordPress?

WordPress is the most popular website platform in the world. It is the first choice of businesses that want to set a feature-rich and dynamic Content Management System. So, if you ask what WordPress is used for, the answer is – everything. It is a super-flexible, feature-rich and secure platform that offers everything to build unique websites and applications. Let’s start knowing them:

1. Multiple Websites Under A Single Installation
WordPress Multisite allows you to develop multiple sites from a single WordPress installation. You can download WordPress and start building websites you want to launch under a single server. Literally speaking, you can handle hundreds of sites from one single dashboard, which now needs applause.
It is a highly efficient platform that allows you to easily run several websites under the same login credentials. One of the best things about WordPress is the themes it has to offer. You can simply download them and plugin for various sites and save space on sites without losing their speed.

2. WordPress Social Network
WordPress can be used for high-end projects such as Social Media Network. If you don’t have the money and patience to hire a coder and invest months in building a feature-rich social media site, go for WordPress. It is one of the most amazing uses of WordPress. Its stunning CMS is unbeatable. And you can build sites as good as Facebook or Reddit etc. It can just make the process a lot easier.
To set up a social media network, you would have to download a WordPress Plugin called BuddyPress. It would allow you to connect a community page with ease and would provide all the necessary features of a community or social media. It has direct messaging, activity stream, user groups, extended profiles, and so much more. You just have to download and configure it.
If BuddyPress doesn’t meet all your needs, don’t give up on your dreams. You can try out WP Symposium or PeepSo. There are also several themes you can use to build a social network.

3. Create A Forum For Your Brand’s Community
Communities are very important for your business. They help you stay in constant connection with your users and consumers. And allow you to turn them into a loyal customer base. Meanwhile, there are many good technologies that can be used for building a community page – the good old WordPress is still the best.
It is the best community development technology. If you want to build your online community, you need to consider all the amazing features you get with WordPress. Plugins such as BB Press is an open-source, template-driven PHP/ MySQL forum software. It is very simple and doesn’t hamper the experience of the website.
Other tools such as wpFoRo and Asgaros Forum are equally good for creating a community blog. They are lightweight tools that are easy to manage and integrate with your WordPress site easily. However, there is only one tiny problem; you need to have some technical knowledge to build a WordPress Community blog page.

4. Shortcodes
Since we gave you a problem in the previous section, we would also give you a perfect solution for it. You might not know to code, but you have shortcodes. Shortcodes help you execute functions without having to code. It is an easy way to build an amazing website, add new features, customize plugins easily. They are short lines of code, and rather than memorizing multiple lines; you can have zero technical knowledge and start building a feature-rich website or application.
There are also plugins like Shortcoder, Shortcodes Ultimate, and the Basics available on WordPress that can be used, and you would not even have to remember the shortcodes.

5. Build Online Stores
If you still think about why to use WordPress, use it to build an online store. You can start selling your goods online and start selling. It is an affordable technology that helps you build a feature-rich eCommerce store with WordPress.
WooCommerce is an extension of WordPress and is one of the most used eCommerce solutions. WooCommerce holds a 28% share of the global market and is one of the best ways to set up an online store. It allows you to build user-friendly and professional online stores and has thousands of free and paid extensions. Moreover as an open-source platform, and you don’t have to pay for the license.
Apart from WooCommerce, there are Easy Digital Downloads, iThemes Exchange, Shopify eCommerce plugin, and so much more available.

6. Security Features
WordPress takes security very seriously. It offers tons of external solutions that help you in safeguarding your WordPress site. While there is no way to ensure 100% security, it provides regular updates with security patches and provides several plugins to help with backups, two-factor authorization, and more.
By choosing hosting providers like WP Engine, you can improve the security of the website. It helps in threat detection, manage patching and updates, and internal security audits for the customers, and so much more.

Read More

#use of wordpress #use wordpress for business website #use wordpress for website #what is use of wordpress #why use wordpress #why use wordpress to build a website

Ahebwe  Oscar

Ahebwe Oscar

1620177818

Django admin full Customization step by step

Welcome to my blog , hey everyone in this article you learn how to customize the Django app and view in the article you will know how to register  and unregister  models from the admin view how to add filtering how to add a custom input field, and a button that triggers an action on all objects and even how to change the look of your app and page using the Django suit package let’s get started.

Database

Custom Titles of Django Admin

Exclude in Django Admin

Fields in Django Admin

#django #create super user django #customize django admin dashboard #django admin #django admin custom field display #django admin customization #django admin full customization #django admin interface #django admin register all models #django customization

Fynzo Survey

Fynzo Survey

1622049211

Fynzo Customer Feedback Software For Cafes, Hotels, Saloons, Spa!

Customer Feedback Tool | Fynzo online customer feedback comes with Android, iOS app. Collect feedback from your customers with tablets or send them feedback links.

Visit page for more information: https://www.fynzo.com/feedback

#CustomerFeedbackSystem
#PowerfulCustomerFeedbackSystem
#freecustomerfeedbacktools
#automatedcustomerfeedbacksystem
#customerfeedbacktools
#customerratingsystem
#Customerfeedbackmanagement

#customer feedback system #powerful customer feedback system #free customer feedback tools #automated customer feedback system #customer feedback tools #customer rating system

Hertha  Mayer

Hertha Mayer

1594180740

How I Fixed an OutOfMemory Exception Due to Custom Tiles on Google Maps in My App

Hello, welcome to my first writeup. This is my experience with debugging an OOM error. Its a long read. I hope you learn something from it. Enjoy :)

I’ve been working on a map app for cycling from some time. A few months back I’d added a feature to see custom map tiles from Open Street Maps inside GoogleMaps. A little background on map tiles from OSM. So OSM is basically a large data set of coordinates and metadata. You’d think OSM is maps, which it is, but its essentially just a ton of data. The latest Planet OSM XML file is over 91GB in size. The maps that you see are statically pre-generated png files. Thats why you’ll notice that when you rotate OSM maps, the labels and everything rotate as well, unlike on Google Maps which are vector maps. These pngs are called tiles and are generated on a daily or weekly basis on tile servers. It is ideally possible to create these tiles on-the-go but that ends up being a costly operation and is not done for the most often seen tiles.

OSM needs to pre-render these tiles for every zoom level on a map. If OSM pre-renders all tiles for all locations for all zoom levels, it would take up a whopping 54TB of space! So they do some interesting tricks to avoid that.

To fetch these tiles, we access a url like this-

https://tile.openstreetmap.org/8/187/108.png

This represents baseurl + zoom/x/y. The x and y are not latitude longitudes but are identifiers for a tile for an area on the map using Mercator Projection. You can read about the related complex math here. Due to the massive number of tiles with increasing zoom level, OSM does not render tiles for zoom levels 20 and 21. One can do it themselves though if the space and computation power is available.

Each of these tiles are 256x256 by default. This is very low res for mobile apps and ends up looking pretty awful. So HD tiles are used which are 512x512 pngs. Here’s a comparison between the two —

Image for post

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Comparison between using 256x256 vs 512x512 map tiles

Now back to Android. To render these tiles, we use a map tile overlay in Google Maps. As the term says, these are just overlays on top of Google Maps itself. To show OSM tiles, I set the google map to not be shown (map becomes blank) and then set the map to show any custom map tile overlay.

googleMap.mapType = GoogleMap.MAP_TYPE_NONE

googleMap.addTileOverlay(TileOverlayOptions().tileProvider(MyUrlTileProvider(this@MapsActivity, url)))

Since these are just overlays, you can use it on top of GoogleMaps itself to show anything. For eg, here I am showing bicycle routes on top of Google Maps and in the second picture, Strava heat map tiles with dark Google Map(a custom map style). Traffic layer works the same way. It’s just another overlay on top of the base Google Maps.

Image for post

Image for post

#google-maps #custom-map-tiles #bitmap #android #openstreetmap