Just started to prepare my system design interview, and found this video with very detailed explanation and pretty useful.
@irtizahafiz2 жыл бұрын
So glad these are helping : ) Good luck on your system design interviews! You got this!
@zenlanfleek6580 Жыл бұрын
Such a clear and well-explained video! It's my first time learning about Geohasing and I totally get it now. Thank you Irtiza!
@irtizahafiz9 ай бұрын
Glad you found it helpful!
@poojaarora014 Жыл бұрын
Pretty crisp and clear explanation , thank you!
@irtizahafiz9 ай бұрын
Glad it was helpful!
@protyaybanerjee5051 Жыл бұрын
Think of each co-ordinate in Level 1 in Binary representation. (00,01,10,11), You can then prefix each cell and zoom into the map.
@krishangopal2475 Жыл бұрын
Great Explaination. Thanks!
@PASTRAMIKick2 жыл бұрын
very useful system, thanks for the explanation, this has such a wide range of uses.
@irtizahafiz2 жыл бұрын
So glad it was helpful! Please let me know if you have any feedback. Always looking to improve the content.
@irtizahafiz2 жыл бұрын
Correction: It's "representing" not "representating" -_- Don't know what happened to me.. Anyways, hope it was helpful!
@kalyanboro6338 Жыл бұрын
we care only about the valuable knowledge you've given to us bro, and we are grateful to you!
@GOUSETEIN9 ай бұрын
its amazing. I wish u all the best.wish u post more videos on system design
@irtizahafiz9 ай бұрын
Thank you! I will start posting again very soon.
@prashantkumardhotre56953 ай бұрын
Video could be edited to avoid repeated info and more examples etc and can be reduced to half of present length.
@soumavanag50258 ай бұрын
Excellent explanation
@irtizahafiz7 ай бұрын
Thanks for that!
@semperfiArs Жыл бұрын
Brilliant explanation
@irtizahafiz10 ай бұрын
Thank you! Glad you found it valuable.
@AllanKobelansky5 ай бұрын
So you map the sphere to a rectilinear grid.
@XboxTest-el5mn Жыл бұрын
very useful thanks !!!
@harinramesh3468 Жыл бұрын
why this guy only this much subs
@irtizahafiz10 ай бұрын
Thank you! I will start posting again soon, so please let me know what type of content interests you the most.
@saminsafaei51259 ай бұрын
We are dividing the world into 64 cells not 32 cells... 4*4*4 (in each level we are dividing each cell into 4 so by level 3 we are multiplying 4, 3 times to it self meaning 4 to the power of 3)
@ayushagarwal05 Жыл бұрын
How we will handle the case of different quadrants where user and POIs are close but they are in different quadrant of level 1
@jinminetics599 Жыл бұрын
Very impressive explanation. I was just having assimilation problem trying to understand the algorithm on wikipedia and some sites. Your explanation made it something a 5 year old can easily understand. Thanks. Just subscribed.
@irtizahafiz10 ай бұрын
Thank you! Glad you found it valuable.
@thisiswill Жыл бұрын
I would be interested in the thinking leading to choosing this algorithm. So, what other algorithms were considered for solving this problem, why arrive at dividing the world this way, what are the pros/cons of this and other algos for consideration. The algo itself is gettable, but arriving at the conclusion to use this algo over others in more crucial to me
@irtizahafiz9 ай бұрын
I am sure there are some great researches behind it, and I wouldn't be surprised if there are more preferred algorithms for this use case. This was just one example.
@mukarramshayah29117 ай бұрын
thanks
@Trother555 Жыл бұрын
Don't know if somebody mentioned but there's a typo in you table on line 6: there sould be 1220 meters.
@irtizahafiz Жыл бұрын
Thank you for correcting. Hopefully this will help others.
@cameronmccoy22044 ай бұрын
Representated -> represented / represent
@irtizahafiz4 ай бұрын
Haha, my apologies. English is hard.
@cameronmccoy22044 ай бұрын
@@irtizahafiz no worries haha, just came to my mind when watching. great vid!
@jamest40272 жыл бұрын
Thank you for the video! I have subscribed! :) I have got a question not all POIs have the same prefix even when they are close. What are the other ways to find nearest POI using geohashing ?
@irtizahafiz Жыл бұрын
Hi! That's a good question. I would recommend getting a few "boxes" around your POI, not one box only. That will help you get around the "boundary problem".
@adityakrverma612 Жыл бұрын
Are Geo-hashing & Quadtress two different strategies? Which one is better ?
@irtizahafiz9 ай бұрын
Not too familiar with Quadtrees :(
@RS-vu5um2 жыл бұрын
Excellent Tutorial. Where can I find the pointer to your notes?
@irtizahafiz2 жыл бұрын
Hi! I try my best to upload the notes. But for some videos, it's not there unfortunately.
@cableraywire2 жыл бұрын
As a native English speaker, I would say "represented" instated of "representated" :).
@irtizahafiz Жыл бұрын
Hi! Thank you for correcting. English is difficult haha.
@cableraywire Жыл бұрын
@@irtizahafiz Yep :). I even had a typo in my response... (instated -> instead)
@silapukanan9522 жыл бұрын
Good video. If I am standing near one corner of a geolocation quadrant,this logic will give me all the businesses that are in my geolocation(the square i am in). But since I am near the edge, would the businesses near the edge of adjacent quadrants get excluded in my search though they are within the distance I am searching for?
@irtizahafiz2 жыл бұрын
That's a very good observation. That's the downside of using only one of the quadrant. To get over the boundary problem, you want to look up businesses from a few quadrant around you, rather than just one.
@Arkham_nine Жыл бұрын
Hi, thanks for the video. What about a case when POIs is around the border of rectangle? For example 2 points are close to each other on the map, but have different first character of hash.
@powerhead Жыл бұрын
I'm also wondering how to solve this. Did you find a solution?
@Arkham_nine Жыл бұрын
@@powerhead Not yet :(
@vippan11 ай бұрын
@@Arkham_nine in this case you can expand your search radius by +- few Km
@irtizahafiz10 ай бұрын
As Vippan pointed out above, you can expand the radius.
@Arkham_nine10 ай бұрын
@@irtizahafiz Hi. How expanding the radius can fix this problem? I don't understand :( Can you show an example please?
@paulcurious23242 жыл бұрын
hey super detailed video!, i enjoyed it thoroughly. Just wanted to ask if you could point me to any guide or an example even of how this could be implemented in code for python
@irtizahafiz2 жыл бұрын
Hi! Glad you enjoyed it. Will appreciate any feedback that you can give for future videos. Here is a good implementation in Python: github.com/wdm0006/pygeohash The documentation the author provided is also super helpful : ) Hopefully that helps!
@paulcurious23242 жыл бұрын
@@irtizahafiz thanks a lot for the pointer will take a look at this. And i have subscribed to you channel so i can watch more of your content
@utkarshgupta29092 жыл бұрын
Irtiza Can you please share your slides with us? These slides are really concise
@irtizahafiz2 жыл бұрын
Hi! Unfortunately, I don't have the slides anymore for this video. I think starting from the next video, I made it a regular thing to upload slides in the Description section.
@utkarshgupta29092 жыл бұрын
@@irtizahafiz thanks
@igor13092 жыл бұрын
I’m not getting what exactly is computed by multiplying width and height in meters and dividing by 1000 🤔
@irtizahafiz2 жыл бұрын
Hi! It's been a very busy couple of weeks because I am changing places. I will try to get back to this comment later in the week.
@JardaniJovonovich1922 жыл бұрын
Correct me If I'm wrong, @@irtizahafiz So, basically, the area of a rectangle is `width*height`. As width and height are in meters, dividing it by 1000 gives you the Kilometres denomination. So, the computation, width*height/1000 represents the area of the location covered by Geohash. As the Geohash length increases, the area decreases
@pavankumars14722 жыл бұрын
Why 32? Is there an explanation somewhere?
@irtizahafiz2 жыл бұрын
Not that I am aware of unfortunately. I was mostly trying to explain the concept. I "think" 32 is configurable and used for demonstration purposes only here. However, I would recommend checking out some other resources if you wanted a more thorough explanation.
@flashliqu2 жыл бұрын
Would you mind to upload your ppt(documentation) for study
@irtizahafiz2 жыл бұрын
Hi. For sure. Sorry I forgot to upload the notes for this one. Other System design videos should have their notes in the video description. Here's the notes for this video: docdro.id/07Vq6FT
@flashliqu2 жыл бұрын
@@irtizahafiz Appreciate it, actually I think your lecture and presentation is really impressive and is really beneficial
@irtizahafiz2 жыл бұрын
So glad to hear that. Let me know if there is anything I can improve on. Cheers!
@Sirshendunath Жыл бұрын
Your math is not right. Width * height gives you square meters not km 😊
@hestajevel10 ай бұрын
I agree, its not distance at all
@soumyajitganguly2593 Жыл бұрын
In a 18 minute video about geo-hashes you do not talk about or even mention the boundary problem. What if I am near the equator? All points to the south of me will have totally different prefixes.
@irtizahafiz10 ай бұрын
I believe I mention the boundary problem, and ways to deal with it in the later part of the video.