₦airaland Forum

ArcGIS, ILWIS, Erdas Imagine and sometimes AutoCAD land development. Are you a GIS person?

jazinogold: thanks

Do you use AutoCAD L.D?

Hello, this thread will focus on a step by step approach to learning the basics of Geographic Information systems. GIS is a system that collects, analyzes and presents intelligent information to solve problems. That is a most easy definition (considering the fact that most people may be hearing about it for the first time)
Feel free to ask questions on this awesome technology or better still, join us on this thread: www.nairaland.com/1498170/what-geographic-information-systems-gis

jazinogold: does autocad land development software perform the same function like other g.i.s softwares such as archg.i.s and so on @op

Autocad L.D is a mapping and not a GIS software! I think where the misconception lies is that people mistake GIS for Digital Cartography, and this is very wrong. A GIS software has two capabilities that exudes a mapping software, firstly a GIS software has a robust database capacity (ArcGIS and MapInfo) while others like (ILWIS) that doesn't have can easily be linked to a MS Access structured database. Secondly, a GIS software has an astonishing analyzing possibility. These analysis like Buffer, Network analysis, Cluster, Geo-Coding, Spatial Interpolation , just to mention a few are what generate intelligent info for decision making. Further more, most GIS software can be powered by web technologies to make these infos more handy. Finally, the CAD which stands for Computer Aided Design is meant to create wonderful designs while GIS is designed to do much more.
Personally I use AutoCAD L.D only when I consult for surveyors since that's what they mostly use... I then convert the files to a GIS format for analysis. Thanks.

Geophysical and geographic information systems (GIS)
methods have been applied to investigate the regional three-
dimensional geological setting and geophysical signature of
sediment-hosted Zn-Pb mineralisation in the Proterozoic
Carpentaria Zinc Belt of northern Australia. The study
focused on the setting of two particular Zn-Pb deposits, HYC in the McArthur Basin and Lady Loretta in the Mount lsa Basin. A GIS incorporating geophysical interpretations,
geological and geochemical data was designed and
implemented for a region in the McArthur Basin
encompassing the giant HYC Zn-Pb-Ag deposit. The GIS
incorporates geological attributes that encode depth
information implicit in the stratigraphic column. This data
structure, in conjunction with topological attributes, allows
queries based on the stratigraphic relationships of spatial
elements. The GIS was used to identify and analyse
constraints on base metal metallogeny and to gain insights
into the 3-D evolution of the McArthur Basin. Mass balance
calculations derived from lithogeochemical data, together with volumes calculated from geophysical and stratigraphic data, indicate that an unrealistic proportion of the carbonate-
dominated McArthur Group would have been required to
source sufficient base metal to form the HYC mineralised
system. At least a major portion of the metals contained in
HYC are inferred to have originated deeper in the basin.
Automatic identification of the location and magnitude of
unconformities on geological maps was used to suggest the
location and size of active subbasins at the time of the
formation of HYC mineralisation. HYC's situation at the
northeastern edge of one of these sub-basins is consistent with topographic and bounding growth fault control on the
palaeohydrogeological regime that focused mineralising fluids in the vicinity of the deposit. Petrophysical measurements from the Mount Isa Basin indicate that the only highly magnetic units are the Eastern Creek and Kamarga Volcanics.
All other units, including Fiery Creek Volcanics basalts, are at most weakly magnetic. Densities of Proterozoic sedimentary units are largely a function of the relative proportion of carbonate and siliciclastic material. The same, albeit weaker relationship was observed with respect to sonic velocity and resistivity, though acoustic impedance contrasts between basin units remain significant. Pb-Zn ore at Lady Loretta has a high density contrast with the highly pyritic layers enclosing it, which in turn are significantly denser than the host dolomitic siltstone. The Lady Loretta ore is also much more chargeable than any of its host units, but there is little resistivity contrast between the ore and host carbonaceous siltstones. Gravity and IP methods are indicated as most likely to distinguish base metal mineralisation from other conductive bodies in this
region. Airborne magnetic and radiometric data flown over
the Lady Loretta region were processed and interpreted to
identify areas of anomalous response with respect to the
'normal' signatures of individual basin units: Integration of
magnetic, radiometric and lithogeochemical data from the
Eastern Creek Volcanics has enabled geophysical
identification of alteration phases. Magnetite destruction, Fe
depletion and possibly K depletion, consistent with chlorite + albite-type alteration, are associated with subdued magnetic signals adjacent to Zn-Pb (Lady Loretta) and Cu (Lady Annie) mineralisation. Anomalously high levels of K and quiet magnetic responses are apparent adjacent to the
Mammoth Cu deposits. Variable K, Th and U signals from
McNamara Group sequences are interpreted to indicate the
location and nature of syn-depositional basin structures and
sediment source regions, including evidence of anomalous
sub-basin development represented by the Lady Loretta host
sequence. The structure and volume of basin units in the Lady Loretta area were inferred from geophysical modelling. Basin structures in this region have been overprinted to varying degrees by the lsan Orogeny. In lower strain areas, there is a WNW trend in pre-Isan Orogeny structures.

Kingphemmy and IamStrata, check this out,

Geophysical and geographic information systems (GIS)
methods have been applied to investigate the regional three-
dimensional geological setting and geophysical signature of
sediment-hosted Zn-Pb mineralisation in the Proterozoic
Carpentaria Zinc Belt of northern Australia. The study
focused on the setting of two particular Zn-Pb deposits, HYC in the McArthur Basin and Lady Loretta in the Mount lsa Basin. A GIS incorporating geophysical interpretations,
geological and geochemical data was designed and
implemented for a region in the McArthur Basin
encompassing the giant HYC Zn-Pb-Ag deposit. The GIS
incorporates geological attributes that encode depth
information implicit in the stratigraphic column. This data
structure, in conjunction with topological attributes, allows
queries based on the stratigraphic relationships of spatial
elements. The GIS was used to identify and analyse
constraints on base metal metallogeny and to gain insights
into the 3-D evolution of the McArthur Basin. Mass balance
calculations derived from lithogeochemical data, together with volumes calculated from geophysical and stratigraphic data, indicate that an unrealistic proportion of the carbonate-
dominated McArthur Group would have been required to
source sufficient base metal to form the HYC mineralised
system. At least a major portion of the metals contained in
HYC are inferred to have originated deeper in the basin.
Automatic identification of the location and magnitude of
unconformities on geological maps was used to suggest the
location and size of active subbasins at the time of the
formation of HYC mineralisation. HYC's situation at the
northeastern edge of one of these sub-basins is consistent with topographic and bounding growth fault control on the
palaeohydrogeological regime that focused mineralising fluids in the vicinity of the deposit. Petrophysical measurements from the Mount Isa Basin indicate that the only highly magnetic units are the Eastern Creek and Kamarga Volcanics.
All other units, including Fiery Creek Volcanics basalts, are at most weakly magnetic. Densities of Proterozoic sedimentary units are largely a function of the relative proportion of carbonate and siliciclastic material. The same, albeit weaker relationship was observed with respect to sonic velocity and resistivity, though acoustic impedance contrasts between basin units remain significant. Pb-Zn ore at Lady Loretta has a high density contrast with the highly pyritic layers enclosing it, which in turn are significantly denser than the host dolomitic siltstone. The Lady Loretta ore is also much more chargeable than any of its host units, but there is little resistivity contrast between the ore and host carbonaceous siltstones. Gravity and IP methods are indicated as most likely to distinguish base metal mineralisation from other conductive bodies in this region. Airborne magnetic and radiometric data flown over the Lady Loretta region were processed and interpreted to identify areas of anomalous response with respect to the 'normal' signatures of individual basin units: Integration of
magnetic, radiometric and lithogeochemical data from the
Eastern Creek Volcanics has enabled geophysical
identification of alteration phases. Magnetite destruction, Fe
depletion and possibly K depletion, consistent with chlorite + albite-type alteration, are associated with subdued magnetic signals adjacent to Zn-Pb (Lady Loretta) and Cu (Lady Annie) mineralisation. Anomalously high levels of K and quiet magnetic responses are apparent adjacent to the
Mammoth Cu deposits. Variable K, Th and U signals from
McNamara Group sequences are interpreted to indicate the
location and nature of syn-depositional basin structures and
sediment source regions, including evidence of anomalous
sub-basin development represented by the Lady Loretta host
sequence. The structure and volume of basin units in the Lady Loretta area were inferred from geophysical modelling. Basin structures in this region have been overprinted to varying degrees by the lsan Orogeny. In lower strain areas, there is a WNW trend in pre-Isan Orogeny structures. The area north of the Redie Creek and Leopard Faults appears to have been persistently uplifted from Myally Subgroup through to early McNamara Group time, with a depocentre to the south during this period. The Lady Loretta deposit is situated on the north- western margin of this former depocentre, immediately adjacent to the uplifted area to the north. The proximity to mineralising fluid conduits in the form of bounding or former growth faults was probably a major factor in the formation of the Lady Loretta mineralisation. GIs and geophysics can be
used at all scales in exploration for Zn-Pb mineralisation.
Analysis of regional geophysics, geology and geochemistry in a GIS can identify provinces and regions containing the
requisite source lithologies, basin architecture and trap rocks
to generate major Zn-Pb deposits. More detailed analysis of
geophysical data can distinguish areas where 'base metal-
depleting' alteration may have originated mineralising fluids
from potentially rich source rocks such as the Eastern Creek
Volcanics. Geophysical analysis can also help to locate
structures capable of focusing mineralising fluids in
favourable areas and, with gravity and IP methods, directly
detect Lady Loretta-style deposits.
I hope you both can now see a Real Life application of GIS to your field. Most people still think GIS is just survey, I say its not.
Think future, Think GIS!

Geo-physics as a career has been benefiting from the intelligence of GIS for decades. However the availability of data hampers the rise of Geospatial technology in this field. What project were you hired for and also let me know your area of interest or better still your undergraduate research so I can use that as a case study.
Think future, Think GIS

[quote author=I_am_strata]ok sir, i love what you are doing and i would like to talk with you one on one. I currently reside in lagos[/quote]No problem. I decided to make this outreach a part of my firms CSR so that many people can come to understand how GIS can assist them. I am also planing an outreach to some schools to encourage students to employ GIS in their projects as this will improve their chances of been published. Also with the response that I have gotten from this thread, I have considered a big slash in our training fee so that it can be economical for students.

GIS in Transport Logistics:
Transport is the main bearer of the logistics function, in the
whole logistics system, its main function is to transport goods to achieve spatial displacement, namely, the achievement of goods “space-efficient.” GPS/GIS technology in the logistics industry is mainly reflected in the transport sectors, with the GPS/GIS technology, can provide location-based services to logistics and transport related information, logistics and transportation for the rational and efficient management to provide strong technical support. This point of focus from the system analysis and elaboration based on GPS/GIS logistics information platform to build the framework, system design and implementation issues.
Think future, Think GIS

[quote author=I_am_strata]is this the same thing as merging in autocad?[/quote]Sorry boss, I'm not really an AutoCAD expert. I mostly use ArcGIS, ILWIS and Erdas Imagine.

Application of GIS Data in Forest Management:
Over the last century, the forest cover of the world has
declined at an alarming rate. Being a renewable resource,
forest cover can be regenerated through sustainable
management. Hence, with the help of remote sensing and
GIS data, a forest manager can generate information with
regards to forest cover, types of forest present within the
area of the study, human encroachment into forest land/
protected areas, encroachment of desert like conditions and
so on. This information is critical in the development of
forest management plans and in the process of decision
making to ensure that effective policies have been put in
place to control and govern the manner in which forest
resources is utilized.
Think future, Think GIS

Parrotpal: @palmtree, from all your posts on this forum i have notice you are very verse in environmental and earth sciences and am very impress. What do you study in school during your undergraduate studies? Or is it the knowledge of GIS that brought abt the diverse knowledge that you have?

B.Sc. Geography, M.Sc Geographic Information Systems. Yes GIS gives you diverse knowledge because it is multi-disciplinary. I have consulted for Business Analysts, Engineers, Geologists and even Information Technology experts. Thanks.

Yes, SRTM if properly analyzed can hold elevation data although ASTER is better. Mosaic is an analysis carried out to join 2 or more geographically referenced map layers. When maps are correctly geo-referenced, they can overlay and join with each other however when you try to zoom, it will affect other layers hence you need to mosaic so that they become one.

[quote author=I_am_strata]nice one there. Mineral exploration cool.
I was thinking......can you map deep underground structures like faults, to creat reservoir models.............. With arcgis and if yes, wat kind of data set would be need to map a depth of like 1-5km or more[/quote]Yes you can, ever heard of DTM or DEM? If you can get ASTER or SRTM data, you can do inverse extrusion. Then overlay it on the geological map of the area. Its kinda complex but when one faces the project, ideas will flow.

OP, have you considered GIS? @Jaybee, you sound like a GIS person, why don't you join this thread www.nairaland.com/1498170/what-geographic-information-systems-gis

GIS for Mineral Exploration.
Mineral exploration geoscientists use diverse types
of datasets, ranging from basic geological maps to
hyperspectral airborne and multispectral satellite
imagery, to search for mineral deposits. GIS allows
geoscientists to bring these datasets together and
accurately calculate economic potential on a single
desktop.
GIS integrates with other specialized programs for
geophysical and geochemical data, image
processing, and CAD. Raster images, such as
satellite or geophysical imagery, can be
integrated and overlaid with vector data such as
geology, faults, and sample information. Tools such
as ArcGIS Spatial Analyst and Geosoft's Target for
ArcGIS help geologists calculate and predict mineral
prospectivity with unprecedented accuracy.
Think future, Think GIS

jerikoyan: Still expecting your mail ogunlajeremiah@gmail.com on the. Training

Sorry for the delay. You may now check your mail. The cost has been adjusted in line with our promotional offer as discussed in one of my previous posts. Thank you

Most people feel GIS is only meant for Environmental Sciences, but do you know that even banks and telecoms use this technology for siting their new branches or atm machines or even customer care priority. For the past 50 years, the USA have been using GiS to monitor desert encroachment from the Mohave desert and Nigeria has also commenced on Sahara desert monitoring. Business analyst have leaned towards the smart maps and intelligent database technology which GIS offers in fine tuning their marketing and Distribution approach.
Its a pity to see Nigerian graduates suffering in the job market and even accepting demeaning stipends when they can equip themselves for a better future. Think future, Think GIS.

Geographic Information Systems (GIS) is widely used across
several fields ranging from Telecomms to Oil and Gas
Industry. Which is why Greenland Consult Ltd (Geo-spatial
and Remote Sensing experts) have decided to bring this
technology closer to our future leaders. Acquire GIS skills
today and provide your self with an advantage over other job
seekers!
If you are currently studying Geography, Urban and regional
planning, Geology, Agricultural sciences, Civil engineering,
Information technology, Estate management, Surveying,
Agric Extension, Public health science and Marketing, we
have customized training classes for all the above listed
disciplines. For hands-on technical training in GIS and
Remote Sensing applications, you can send a mail to
greenlandconsult89@gmail.com or tomimgis@gmail.com.
Phone: 08061185492
We also offer advanced training sessions on Crime mapping
analysis, Land information systems, Forest and natural
resource management, Environmental impact assessment
and Environmental Modelling. Thanks.

BlessedFellow: I'm based in Edo state. EIA of a project in the extractive industry. I used it to aid the location/design of infrastructure and how to mitigate the impact of the project.

...and you used GIS exclusively or you were assisted?

BlessedFellow: I'm looking to becoming one. I can do lil stuff with ArcGIS when preparing an EIA.

Where are you based and could you share more details on what the Environmental Impact Assessment was on?

BlessedFellow: Please I wish to find out if up-to-date GIS data are available in Nigeria.

Cheers!

It depends on the data you require, are you a GIS person?

Did you know that your car trackers run on a smart map (GIS) technology? Several analysis that can aid your career can be implemented using a GIS. Students and academics alike should endeavor to employ GIS in their projects as this will give them hands on experience of the technology. Also using GIS to power your projects will enhance its credibility to gain publishing status in local and foreign journals. Feel free to discuss your projects here. Thanks

Last training course for this year will commence on the 2nd of December 2013, Hurry!!!

arkdiggs: I need more info on relevance to Geoscience ... Although, I knw abt it and am registered on esri websites with various free training modules, buh its beta to learn from those who can teach you in the best ways ....
Send me ur info

adigunakeemolanrewaju@yahoo.com

How far have you gone with GIS? Our training includes a basic GIS course coupled with a customized training on your specialization. Our training centre is at Ibadan, Let me know. Your specialization so we will start from there.

Hello Guys! I must say that I am quite impressed with the way this thread is turning out. I created one thread on the Jobs/Vacancies section where I hoped to expose job seekers to how they can make a living as a GIS specialist but the Mods due to reasons best known to them, moved it out of the section. I have received over 20 mails from people who wish to undergo our basic GIS course, thus I wish to state that for those of you on this thread ALONE who are currently students and wish to undergo the training, we are offering a 20% discount.
The reason for this is to ensure that the motive of this thread which is meant to enlighten is not defeated. I hope that this act of magnanimity will spur us to research and ask more questions on GIS. Thanks

EdDave: Based on your experience, how then does one market himself as a freelancer? And how much can one charge for services?

-For starters, you really need to be grounded in the technology because the GIS expert sells his ideas not the technology, you only use the technology to process and present your ideas.
-Know your target market- everybody including govt, coys and even the academic is a potential market, it all depends on the approach.
-Be smart, resourceful and improve on your analytical and problem solving skills.
-Package your self, look official, be confident and always smile.
-Establish or join a GIS networking blog to update yourself.
All that I have discussed above will help you succeed in GIS freelancing, but since you don't have a good knowledge of GIS yet, going into the details might bore you.
Billing depends on the project and how far the client is willing to go. If the client is bringing the required data then the fee can be reduced (although most clients don't).
There is no minimum fee for a GIS project, I have billed a client just 25k and I have also charged considerably higher even when I was a part time GIS guy. I have colleagues who have executed multi-million naira projects. Have you gotten my mail?

doziej84: doziej84@yahoo.com

thanks

whats the meaning of GISCP?

Check your mail. GISCP means Geographic Information Systems Certified Practitioner. It is awarded by ESRI in Canada. After the training, you can attempt the exams. Like I said earlier only persons in Ibadan or that can attend the course at our centre should make inquires on our training services. Others should bring up questions or initiate discussions. Thanks

doziej84: doziej84@yahoo.com

thanks

whats the meaning of GISCP?

Check your mail. GISCP means Geographic Information Systems Certified Practitioner. It is awarded by ESRI in Canada. After the training, you can attempt the exams.

doziej84: @ Palm tree, kindly send me the course and prices for the GIS training your firm runs. Am interested.
Does it come with a form of certification?

Please post your mail address and I will mail you the information you require. Yes, candidates get a certificate of participation on completion of the training. This training is guaranteed to equip you to handle a standard GIS. We can also facilitate the GISCP exam so you can also be ESRI certified. NB: ESRI are the producers of ArcGIS and they account for more than 60% of the GIS industry.

I will discus GIS for Geology next week.