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Akhilesh Kumar Karna
Приєднався 30 лип 2006
Python and QGIS (Using Processing Algorithms)
# Python and QGIS (Processing Algorithms)
## Video: Land Use Analysis (Using MODIS data)
### Analysis
---------
Find the annual land use changes of a given area (Region of Interest, ROI) and its different zones (Zonal Statistics).
### Required knowledge
---------------------------
1. What is raster data?
2. What is NDVI?
### Learning Goals
----------------
1. Learn Processing Tools
2. Learn how to automate processing tools
### Steps
---------
1. Download MODIS data of the ROI of multiple years [ua-cam.com/video/OONVLaU3R7M/v-deo.html]
2. Merge the MODIS data bands spatially
3. Clip each merged data to the ROI
4. Calculate NDVI
5. Reclassify NDVI
6. Calculate Zonal Statistics
7. Create Graphs/Charts
## Video: Land Use Analysis (Using MODIS data)
### Analysis
---------
Find the annual land use changes of a given area (Region of Interest, ROI) and its different zones (Zonal Statistics).
### Required knowledge
---------------------------
1. What is raster data?
2. What is NDVI?
### Learning Goals
----------------
1. Learn Processing Tools
2. Learn how to automate processing tools
### Steps
---------
1. Download MODIS data of the ROI of multiple years [ua-cam.com/video/OONVLaU3R7M/v-deo.html]
2. Merge the MODIS data bands spatially
3. Clip each merged data to the ROI
4. Calculate NDVI
5. Reclassify NDVI
6. Calculate Zonal Statistics
7. Create Graphs/Charts
Переглядів: 153
Відео
GIS in Nepali (Lesson-6): Basics of DEM Analysis (Nepali)
Переглядів 1286 місяців тому
यस भिडियोमा Elevation Analysis कसरी गर्ने र यसमा कस्ता कामहरू गर्न सकिन्छ भन्ने बताएको छु।
Remote Sensing Basics (Nepali)
Переглядів 996 місяців тому
यस भिडियोमा रिमोट सेन्सिङको बारेमा वर्णन गरिएको छ। अरू विस्तृत बुझ्न भिडियो हेर्नुहोला।
Export Raster Image from Grass and Use in Latex
Переглядів 2916 місяців тому
This tutorial will show you how to export a raster from Grass GIS and then use it in Latex. I have used Overleaf in this example.
GIS in Nepali (Lesson-5): GNSS and its applications
Переглядів 657 місяців тому
यस भागमा समेटिएका विषयहरु १ GNSS भनेको के हो? २ स्मार्टफोनले आफ्नो ठाउँ कसरी पता लगाउँछ ३ यसको प्रयोग कसरी गर्ने यो भिडियो हेरी सकेपछि अभ्यासका लागि तलका लिङ्कहरू हेर्नु होला GNSS को अभ्यास ua-cam.com/video/iiJr_FC2dhI/v-deo.html [Using SW Maps] ua-cam.com/video/Q7Vv6TJk2uU/v-deo.html [Using SW Maps Data in QGIS to make report] लोकेशन शेयर कसरी गर्नेः ua-cam.com/video/G-1Y530OYNo/v-deo.html
Share Location (लोकेशन शेयर कसरी गर्ने)
Переглядів 507 місяців тому
यस भिडियोमा स्मार्टफोन प्रयोग गरेर लोकेशन शेयर (आफु रहेको ठाउँ अथवा कुनै पनि ठाउँ) कसरी गर्ने भन्ने सिकाउने प्रयास गरेको छु। १- WhatsApp २- Viber ३- Google Maps
GIS in Nepali (Lesson-4): Raster Data and Symbology (Nepali)
Переглядів 1097 місяців тому
मैले यस भिडियोमा रास्टर भनेको के हो र यसमा कस्तो खालको डाटालाई प्रस्तुत गरिएको हुन्छ भन्ने बारेमा वर्णन गरेको छु। राष्टर डाटालाई कसरी हेर्दा राम्रो र बुझिने तरिकाले प्रस्तुत गर्न सकिन्छ भन्ने बारेमा कुरा गरिएको छ। तीन वटा फरक प्रकारको रास्टर डाटालाई तीन वटा फरक किसिमको सिम्बल प्रयोग गर्ने तरिकाको बारेमा सैद्धान्तिक रुपमा वर्णन गर्ने प्रयास पनि यस भिडियोमा गरिएको छ। प्रयोगात्मक सिकाईको लागि तलको...
GIS in Nepali (Lesson-3)
Переглядів 15810 місяців тому
यस भाग मा मैले Vector data analysis कसरी गर्ने भन्ने विषयमा कुराहरू गरेको छु। भेक्टर डाटा Analysis गर्नलाई कस्तो कुराहरू जानकारी हुनपर्छ त्यसको बारेमा विस्तृत कुरा गरेको छु। यसमा सिकेका कुराहरू अभ्यास गर्नलाई तल दिएको लिङ्कहरूमा क्लिक गर्नुहोला ua-cam.com/video/XMr-LJhsnEY/v-deo.html Vector डाटा Analysis को अभ्यास
GIS in Nepali (Lesson-2)
Переглядів 23011 місяців тому
यस भाग मा मैले दुइवटा विषयहरूमा कुराहरू गरेको छु। 1. Vector data 2. coordinate reference system यसमा सिकेका कुराहरू अभ्यास गर्नलाई तल दिएको लिङ्कहरूमा क्लिक गर्नुहोला ua-cam.com/video/XsjFabn9_hc/v-deo.html (Vector डाटा Toolहरू) ua-cam.com/video/QHEEGKO3Sz0/v-deo.html (CRS को अभ्यास)
GIS in Nepali : Lesson-1
Переглядів 43911 місяців тому
नेपाली भाषामा मैले GIS सिकाउने प्रयास गरेको छु। यसमा मैले आफूलाई सैद्धान्तिक कुरामा बढी केन्द्रित गरेको छु। यस पहिलो अध्यायमा GIS को परिभाषा र यसको प्रयोग के को लागि गरिन्छ भनेर बुझाउने प्रयास गरेको छु। आज भन्दा ३० वर्ष जति अगाडी Excel को ट्रेनिङ लिएको याद आउँछ। त्यति बेला Excel को प्रयोग गर्नेहरूको संख्या निकै कम थियो। अहिले Excel जसले पनि प्रयोग गर्न सक्छ। GIS को प्रयोग पनि अहिले बढदै गएको हु...
Using QGIS2threejs plugin in QGIS to create 3d image which can be rotated and zoomed
Переглядів 390Рік тому
In this video I would like to explain in a very simple way how to create 3d image in QGIS which looks beautiful. You can put it in a website and share with our friends. You can use your own data or download from here: [Point and Road data]: mrakhilesh.com/GIS/data/practice/pt.gpkg [DEM transformed to UTM zone]: mrakhilesh.com/GIS/data/practice/bhojpur_utm.tif The output can be viewed here: mrak...
Create Map Atlas in QGIS.
Переглядів 929Рік тому
In this video I will be talking about creating map atlas in QGIS. What is Map Atlas? We create multiple printable maps from a single map based on one of the layers in QGIS. For example, - We have a map of USA with a layer named States and other layers such as roads, water-body, airports etc. - Now we need to create maps of each state. Map Atlas feature of QGIS does it for you. I will show you h...
Landslide Susceptibility Mapping Part-4, Final: Calculating weightage, susceptibility and validation
Переглядів 1,3 тис.Рік тому
1. Analyze cross-tabulation stats 2. Create weightage for each parameter classes and reclassify again using weightage 3. Sum the reclassified rasters 4. Classify into High/Medium/Low susceptible areas 5. Validation Previous video links 1. [downloading data creating landslide polygons](ua-cam.com/video/5hdv7DJ6GnI/v-deo.html) 2. [parameter calculation/reclassification](ua-cam.com/video/3ZBLVy08L...
Landslide Susceptibility Mapping Part-3 : Calculating stats for each parameter-classes
Переглядів 890Рік тому
[URL](mrakhilesh.com/GIS/lsbook/intro.html) Part-3 : Calculating stats for each parameter-classes 1. Import landslide polygon to Grass-GIS 2. Convert landslide polygon to Raster 3. Cross tabulation of landslide to each parameter 4. Calculation of class-wise landslide density/score 5. Summation of the scores for each parameter-class. (Note: In the video, it is mentioned that we are going to calc...
Landslide Susceptibility Mapping Part 2: Creating parameters raster data
Переглядів 1,5 тис.Рік тому
[Note: Refer mrakhilesh.com/GIS/lsbook/intro.html] Processing Elevation Data and Sentinel-2 Data 1. Create the followings from Elevation a) Slope b) Aspect c) Tangent curvature d) Profile curvature e) River network 2) Create the followings from Sentinel-2 Image a) NDVI b) NDWI 3) Reclassify the above parameters
Landslide Susceptibility Analysis using QGIS and Grass GIS, Part-1: DEM and digitizing of landslides
Переглядів 5 тис.Рік тому
Landslide Susceptibility Analysis using QGIS and Grass GIS, Part-1: DEM and digitizing of landslides
Remote Sensing Image Classification SNAP-Desktop
Переглядів 1,1 тис.Рік тому
Remote Sensing Image Classification SNAP-Desktop
Basic operations with Remote Sensing data in SNAP-Desktop (Part-2: Analysis)
Переглядів 562Рік тому
Basic operations with Remote Sensing data in SNAP-Desktop (Part-2: Analysis)
Remote Sensing with SNAP Desktop (Part-1: Basic operations)
Переглядів 715Рік тому
Remote Sensing with SNAP Desktop (Part-1: Basic operations)
Field Survey Using SW Maps (for Android and iOS)
Переглядів 1,4 тис.Рік тому
Field Survey Using SW Maps (for Android and iOS)
Network Analysis Practice (with QGIS and python)
Переглядів 710Рік тому
Network Analysis Practice (with QGIS and python)
Analysis of Land Use Change using MODIS Data and QGIS and Grass-GIS (Final: Analysis and graph)
Переглядів 983Рік тому
Analysis of Land Use Change using MODIS Data and QGIS and Grass-GIS (Final: Analysis and graph)
Analysis of Land Use Change using MODIS Data and QGIS and Grass-GIS (Part-3: Calculation of NDVI)
Переглядів 1,2 тис.Рік тому
Analysis of Land Use Change using MODIS Data and QGIS and Grass-GIS (Part-3: Calculation of NDVI)
Analysis of Land Use Change using MODIS Data and QGIS and Grass-GIS (Part-2: Clip MODIS Data)
Переглядів 951Рік тому
Analysis of Land Use Change using MODIS Data and QGIS and Grass-GIS (Part-2: Clip MODIS Data)
Analysis of Land Use Change using MODIS Data and QGIS and Grass-GIS (Part-1: Downloading data)
Переглядів 1,2 тис.Рік тому
Analysis of Land Use Change using MODIS Data and QGIS and Grass-GIS (Part-1: Downloading data)
Analysis of Elevation Data with QGIS and Grass-GIS
Переглядів 481Рік тому
Analysis of Elevation Data with QGIS and Grass-GIS
Vector Analysis Techniques using QGIS (GIS)
Переглядів 544Рік тому
Vector Analysis Techniques using QGIS (GIS)
Downloading DEM of desired area from Earthdata website
Переглядів 486Рік тому
Downloading DEM of desired area from Earthdata website
Report Creation in GIS (QGIS) from SW Maps Data
Переглядів 1,5 тис.Рік тому
Report Creation in GIS (QGIS) from SW Maps Data
Good day please i am from Nigeria. where can i download a Nigerian data from
I don't have much idea about Nigerian data. However, you can download plenty of data such as satellite data, OSM data etc for any place on the earth.
Very helpful
Glad you found it useful!
Nice work
Thank you!
Thank You Sir
You are most welcome!
Sir if we have already considered NDWI , is it still needed to use rainfall data ? and if we are using rainfall data then where can we integrate that data ?
I generally don't consider rainfall. However you need to understand why. Many times you get lower numbers and area of landslide where rainfall is higher. This will give faulty scoring. If you want to use rainfall then you need to change scoring method. For example you can use ahp where scoring depends on actual causes. This exercise is just to understand the tools.
@@AkhileshKarna Allright sir thank you
Thankyou sir for creating this vedio ment a lot for the learner like us, Thankyou once again
Thank you! Such comments always motivate me!
Informative! I did sent you an email sir. If you could check it, that would be much appreciated.
I think it will be difficult for me to personally help you. I think you can follow this tutorial along with the website I have mentioned in one of my comments. I will try to create one website where I can respond to specific concerns.
@@AkhileshKarna thank you for acknowledging my message sir, much appreciated.
Hello sir, where can i find ward level shapefile of Nepal?
Actually I also don't know the authentic sources for ward boundary data. You need to approach individual city, probably.
Thank you for the sharing
Thanks for watching!
Sir, i am from PH and I would like to say thank you for teaching this online and for sharing your professional knowledge to all GIS practioner. Btw, do you have a roadmap on how to be proficient in using QGIS and how to integrate Python.
I am very sorry that I couldn't see your comment in time. By the way if you want to learn step by step, please follow tutorials in the following link one by one. mrakhilesh.com/myweb/posts/learn-gis-video-tutorials/ You will certainly become proficient.
You can be proficient by following these tutorials mrakhilesh.com/myweb/posts/learn-gis-video-tutorials/
Hloo bro in my phone location is not tracking in this apps what the reason 😔
You need to allow location permission and keep location tracking on. I don't think there will be any problem if you follow the tutorial properly.
sir ot problem on adding sentinel plugins in grass gis8.3
I have not used 8.3 yet. I will try it some time. For the time being you can use 'r.import' command and point input to the "\S2A_MSIL2A_xxxx_xxx_xxx.SAFE\GRANULE\L2A_T45RUL_Axxxx\IMG_DATA" folder. The date time in the folder name is changed to xxx. You need to find the location of IMG_DATA folder inside the unzipped folder.
How can we make something like this?
I used following steps: 1. Convert polygon to line. 2. Split the line into parts (straight lines) 3. Use Time Manager plugin. (Now replaced by temporal controller: www.qgistutorials.com/en/docs/3/animating_time_series.html) 4. Create animation using 'Imagemagick' which is a separate software.
sir it shows error while trying supervised classification using both band components 1-6 and also NDVI as undefined symbol '$.ndvi'
Very impressive and informative video respected sir Akhilesh Kumar Karn
Always a pleasure to see your content, sir.
Thank you!
The SQL (cited in the video) is here. select t1.field_1, t1.field_3 as ls_no, t2.field_3 as ls_yes from ( select * from aspectcross where field_2 = -1 -- not landslide and field_1 > -1 )t1 left join ( select * from aspectcross where field_2 = 1 -- not landslide and field_1 > -1 )t2 on t1.field_1 = t2.field_1
It make me easy for the completion of Task Respected Sir
Sir, you're using QGIS?
Yes, and teaching too.
Great video, greetings from colombia
Thank you so much for your appreciation! Hope it helps you and others.
Very informative tutorial!!! Great sir
Thank you Mohan ji! It is my pleasure that you liked the video!
Sir, you have tutorial on how to fit lidar data?
No. Sorry I didn't make such tutorial. I will try to do one soon.
@@AkhileshKarna thank you Sir. I am working with lidar data and sometimes the GIS application that we are using isn't capable in fitting.
I randomly stumbleld upon to your yt page and GIS practitioner residing on PH and python user ☺️ i hope you'll help me in near future.
It will be my pleasure if I can be of any help! Thank you for your appreciation. You may share with your friends. Some of them may benefit.
Sir the link you have mentioned should be search.earthdata.nasa.gov/search instead.
Thank you for pointing out. I am checking and correcting.
Very helpful video
Thank you!
Great Video.
Glad you enjoyed it
Great Video. Can you make one in which we can use MUTM coordinate system
Even if you use MUTM, the process of symbolizing will be the same. If you want to know more about MUTM based CRS, I will try to talk about it in future.
Sir aap ka se ho
Nepal se
@@AkhileshKarna sir Hindi me video bnaoo
I will try.
Very nice video
Thank you for your appreciation.
@@AkhileshKarna sir aap ka se ho me Rajasthan se hu please btana
very informative video sir
Thank you.