Wednesday, 28 August 2019
Is Land Surveying Art or Craft?
Thursday, 22 August 2019
The history of ArcGIS
The history of ArcGIS
Esri, Environmental Systems Research Institute, knew there was a starving market for location-based systems also known geographic information systems (GIS). In 1990s, Esri started working on a product that later became one of the best enterprise solutions for GIS implementations on Windows systems. In 1999, ArcGIS was released. Since then, ArcGIS hasbecome the most used commercial GIS solution. ArcGIS was then renamed ArcGIS for Desktop, and the ArcGIS name was used as a product line instead to carry lots of products under it.
When the Web started to become ubiquitous in early 2000s, Esri adopted the Web by rolling in ArcGIS for Server and gradually ArcGIS functionalities as web services so that it could be supported on multiple platforms including mobile phones.
A decade later when the cloud solutions began to surface, Esri released its Software as a Service (SaaS) solution ArcGIS Online. Designed to simplify the user experience, ArcGIS Online hides all the ArcGIS "contraptions" and technologies to relieve the user from maintaining the hardware and software, leaving the user to do what they do best, mapping. Having everything in the cloud allows users to focus on their work instead of worrying about configurations, spinning up servers and databases, and running optimization checks.
Note
SaaS, a cloud-based software distribution model where all infrastructure, hardware, management software, and applications are hosted in the cloud. Users consume the applications as services without the need to have high-end terminal machines.
Today, Esri is pushing to enhance and enrich the user experience and support multiple platforms by using the ArcGIS Online technology.
In this book, we target one of the core products of the ArcGIS family—ArcGIS for Desktop. By using real-life examples, we will demonstrate the power and flexibility of this 16+ year-old product ArcGIS for Desktop. We are going to use the various tools at our disposable to show how we can extend the functionality of ArcGIS for Desktop.
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Wednesday, 21 August 2019
FUSING IN CAD CAPABILITIES INTO GIS. BY HONEST S. O. U.
FUSING IN CAD CAPABILITIES INTO GIS. BY HONEST S. O. U.
ArcGIS as a GIS software lacks some cartographic capabilities for drafting of work. We are often left with converting/ exporting our GIS work into a CAD environment and after some modifications in CAD environment, the work is exported back to ArcGIS environment. GIS lacks some conventional cartographic signs and symbols and does not allow free sketching of such signs/ symbols, a times we make do with Adobe Illustrator and other softwares to aid us. The question therefore is, how can we fuse in CAD capabilities into GIS environment? I found out a simple method of doing this. You can convert your shape file to CAD file. Without closing the ArcGIs, open the CAD file and do the necessary modifications on the CAD work. Use layer plotting for all text files, signs and symbols so that they can come out as layers in ArcGIS. After all the modifications both the layout and adjustments in the digitized features (Point, Line and Polygon) .Save your CAD work and open your ArcGIS file which u minimized and you will find all the modifications on your ArcGIS. Cheers.
STEPS FOR CONVERTING YOUR ArcGIS SHAPE FILE TO CAD. 1.Goto ArcToolbox.
2.Select Conversion Tools. 3.Select to CAD. Select ,Export to CAD. Under Input Features, (select the shape files you want to convert). Under Output Type( select the DWG- the AutoCAD version u want to save it), Under output file(Select the folder you want to save it). 4. Select Ok and wait for the files to convert/export to CAD. When its successful, it pops out successful message on the ArcGIS environment
Tuesday, 20 August 2019
*Step-by-step work through on earth volume computation using sufer*
*Step-by-step work through on earth volume computation using sufer*
The procedure assumes you already have sufer installed on your PC
👉Launch the sufer application by double clicking its icon on your desktop
👉On the program main menu, click Grid
👉Click data... in the drop down sub-menu
👉Navigate and locate the raw file containing your x,y,z data defining the surface in question
👉Click Open
An interface showing some sample of your data is displayed on the screen
👉Ensure that the appropriate field delimeter is selected and click OK
👉On the Grid Data interface that comes up next, select the appropriate field (i.e column) for each of your x, y, z data as contained in the previous interface
👉Select any desired griding method on the space provided for such on the Grid Data interface. The common and default method is kriging
*Note* : the result you obtain depends pretty much on the grid method you select as each of the methods uses different models in predicting the Grid elevation of the unobserved points
👉Click OK
The griding is then carried out by the application and the report displayed on the screen that can be saved to a file
*Note:* These procedures applies for each of the surfaces in the case of two surfaces volume computation. For a single surface, you just do that once for the available surface file
Next is to compute volume using the grid file created
👉On the program main Menu, click Grid
👉Click Volume in the drop down menu
👉Browse and locate the grid file created
👉Click to open the file
👉The Grid Volume interface pops up where you are expected to define your surfaces
👉The upper surface is natural ground surface (Topo-surface) for which a grid file has been created
👉The Lower surface is the grade or design surface
👉 For each of the surfaces, you can either chose to load a grid file or use a constant value
👉For a single surface volume with only the natural ground grid surface elevations, click and upload the grid file for the upper surface and define a constant, z value for the lower surface (graded surface)
👉 Leave the Z- factor as 1
👉Click OK
The cut and fill volumes are displayed with the associated areas obtained
*Note*: the results earth volumes may vary from one application to another even with the same data depending on the method for computing areas and of course the griding method
Sunday, 18 August 2019
15 things guys want but wont ask for
by Azeemen
Written by Azeemen
Saturday, 17 August 2019
GOOGLE EARTH LIMITATIONS
GOOGLE EARTH LIMITATIONS. Google earth images does not come in high resolution although some technique can be employed to increase the resolution of the images. Such techniques includes and not limited to breaking the area of study into a well planed overlaying strip layers. This helps you download images with a small area that will be of a bit high resolution and this requires that for that given study you may have up to 30 image layers. Remember google earth images lacks spatial reference and this means that there is need to Georeference all these 30 image layers and thereafter you do image mosaic to merge all the 30 overlapping image layers. This is cumbersome to say the least and also introduces alot of errors. What are then the sources of errors here? Before downloading such images from google earth, you have control points you want to use for georeferencing (can be monument or landmarks you know their coordinates or you can choose those points on google earth and extract their coordinates) .These points while georeferencing, you may not be able to get the exact point having that coordinate in the images and this shift have introduced an error, imagine where such accumulates over those 30 image layers and see the error you have just in your georeferencing. This results to tilt in the image after georeferencing. When digitizing also, there may be some shadows on the structures as a result of low resolution data, and you may trace the shadow thinking it's the structure outline. This also a source of error. These and many more are the limitations of google earth images but fear not as am about to introduce you to amazing that can offer you much more and eliminates such limitations as observe in google earth imagery.
Friday, 16 August 2019
MY FATHER’S FARMLAND
PART 2
“MY FATHER’S FARMLAND”
©️Opeyemi Ojerinde Akintunde
Oba ( King) as His name suggests had a way of making people do his bidding. He cajoled his sisters into the fasting and praying program.
Ola(Wealth) and Ope (Praise) joined Oba in the fast and it was a humbling time for them. They wept before the Lord and prayed with all their heart.
They were so broke that they didn’t have money to buy food to break their fast on the third day.
Ola ( Wealth) who was the business minded one, decided to go look for a means of making money. As weak as she was, she walked straight to one of the beautiful houses in their environment. She knocked at the gate and surprisingly to her, it was the Madam of the house that answered...
“ Good Afternoon ma!” Ola had said
“ Yes, Good Afternoon !” Miss Johnson said with a puzzled look for lack of recognition
“ Ma, my name is Kikiolaoluwa and I live down the street, I am not here to beg you for money, but I need money for my siblings and I to eat, so please ma, is it possible for me to wash any dirty clothes you have, to earn a little cash...” Ola had said pleadingly
“ Wow!,... unfortunately I use a washing machine that takes care of my laundry”
“ What about sweeping the compound, I can see your compound needs some sweeping” Ola said with desperation in her voice as she was simultaneously stretching her neck in other to have a good look at the compound..
“ Hold on young lady, is this about you getting money to eat, if it is about that, I can give you some money.”
“ Aww, That is so nice of you ma, but I would love a permanent work, something that will fetch me regular money. My siblings and I just lost our father and my brother asked us to wait on God for three days for God’s guidance, Today is the 3rd day and we don’t have anything to break our fast... That’s why I took it upon myself to do a menial job to get money...so if you give me money right now, it might not be enough to sustain us for days..” Ola said
“ Are you saying, you and your siblings have not eaten for three days, because you were fasting and now you have nothing to break your fast ?” Miss Johnson asked
“ Yes!”
“ Wow!...where do you live?” Miss Johnson asked
Ola pointed towards her house and Miss Johnson told her to take her to their place. She wanted to know the authenticity of Ola’s claims. As Miss Johnson walked behind Ola, Ola knew Oba( King) was not going to be happy with the development. Oba didn’t like asking people for Favours. Ola had always told him, he was proud, but Oba would say “It is Self respect, I know my worth, I may not be where I ought to be, but I must not sell myself cheap because of where I am today!”
“ ...eat at my place” Miss Johnson was saying but Ola only heard her last words about eating at her place...
“ I am sorry, I didn’t get you ma...I was lost in thoughts”
“ Oh!, I was saying that if I can verify your claim, then you and siblings will follow me to my place to have a decent meal...”
“ Oh!, thank you ma’am, that’s really thoughtful of you ma’am. May God bless the work of your hands and may your children find help wherever they find themselves...”Ola said beaming with smiles
“ Amen..” Miss Johnson said returning Ola’s smile
At that point they were already in front of the Trio’s room. It was a very small dark room with the only source of light finding it’s way into the room from a miniature window. The rooms had no furnitures except for a wooden shelf of books belonging to Oba. They had sold everything sellable, but Oba being an avid reader could not do away with his wooden shelf that housed his books. They also had two mats on the floor; the twin girls slept on one while Oba slept on the other mat. There were sacks neatly placed in a corner. The trio had neatly arranged their clothes in there...
Oba was lying on the floor reading a motivational book about leadership, but Ope had a small mp3 music player in her hands with her earpiece tucked in her ears... Oba sighted the visitor first and on seeing her, he jumped to his feet wondering what his sister had done...
Miss Johnson looked around and could not believe people could still live in houses like this, Eben, Her security man who she had sent on an errand earlier that morning was not even living in a room as terrible as what the trio was living in..
“ Hello...” Miss Johnson said
“ Good Afternoon ma” Oba and Ope said looking at Ola for answers as to why they had a visitor in their room...
“ Emmm... Madam lives down the street... I went to her place to see I can get a menial job in other to fix food for us, but she asked to know my house to be sure of how genuine I am “ Ola said...
“ Ok .. Ma.., she is very genuine.. She is our sister ...”Oba said taking full responsibility as always
“ Oh!, You are a twin!” Miss Johnson said when she noticed Ola and Ope were identical.
“ Yes ma”
“ Wow!, I have always prayed to have twin girls, I totally adore twins... It is well, Your sister has told me about your recent loss and I am very sorry for your loss, But whatever I am able to do, I will do for you, especially for the fact that you know the Lord. What challenged me about her, was the fact that she said you all took it upon yourself to wait upon the Lord after losing your father..., that is a bold step I must say. For that reason, I won’t hesitate to show God’s Kindness to you..” Miss Johnson said...
“ Ok ma, thank you ma’am!”
“ So what do you say?” Miss Johnson asked
“Was this woman asking if she could help them?” Oba wondered silently...
“ Yes ma!, we will be glad to accept your God centered kindness towards us...” Oba said stressing and Emphasizing the “ God-Centered”. His intention was to let the woman know that though they were poor, they were not willing to compromise by doing anything that doesn’t glorify God...
“ Ok, let’s start with you breaking your fast at my place. I will have my maid make something for you!” Miss Johnson said with a smile.
Ola was the first to return the smile, followed by Oba, but Ope was the meticulous one. She was always very careful about trusting people. She was the deep one among the trio, she spoke few words but had deeper insight than the other two...
“ Can’t she give us the money and we sort ourselves out?” Ope whispered in Oba’s right ear...
Oba gave her a reassuring look, that they would be fine...
Oba, Ope and Ola went with Miss Johnson to her house and .....
To be continued
To follow up on this series, Follow the author on Facebook @ OPEYEMI OJERINDE AKINTUNDE-OFFICIAL Feel free to share this series, but please do not edit out the credit of the author and details. Lets be mindful of others.
DEEP THOTS NOVELS
INSPIRED BY THE HOLY ONE
Written by Opeyemi O.Akintunde
+234-8151103646
Photo credit: Internet
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