ArcGIS - Science topic

Dear colleagues!

We would like to ask if someone knows from where we could get spatial data of Kyrgyzstan (focus Issyk Kul Oblast).

The best would be of course open-access and in formats compatible with ArcPro, QGIS, etc.

We are particularly interested in:

> land use (similar to the CORINE Land Cover, if existent...)

> plant growth/health, forestry

> biodiversity

> climate & precipitation, weather in general

> population (permanent, tourism)

> road network

> DEM

> ... whatever is available

Please let us know,

thank you and best regards!

Hello

I provided maps of soil particles (sand, silt and clay) from the data of the points by the geostatistics. Now I want create mapping soil texture classes study area in ArcGIS, Please provide advice

Hello Experts,

I am trying to run an SDM for present and future conditions using Maxent, but the picture of the model appears to be not identical as well as losing a block of pixels near the top of the study area. Note that I had set my study area shape file in 'processing extend' and 'raster analysis' sections while extracting the layers. All the variables were processed at the same extent and cell size for maxent analysis.

Here I attached my study area, present, and future distribution for your convenience.

Thank you.

How can i use the following formula in QGIS Calculator:

(your_res /1000)/(6 * Exp(-3.5 * Abs(Tan(("your_slope" * 3.14159)/180) + .05)))

P.s. The formula had been modfied from the orignal function and had been used in ArcGIS

Dear All,

I have district shape files (polygons) and Demographic and Health Survey (DHS) cluster points (point shape file). I want to know how many point shape files lie in each district? anyone who could guide me how to do it in ArcGIS or in Rstudo? The screen shot is attached herewith. Thanks

Our undergraduate team is trying to correlate Land Surface Temperature (LST) to morbidity rates of Leptospirosis in Manila, Philippines. We are using Climate Engine (https://app.climateengine.com/climateEngine) as our source of data, but available LST data points vary wildly each year. How can we get appropriate yearly averages for land surface temperature? Your help will very much be appreciated.

I am looking for an algorithm or GIS software that, for a solar panel or a larger area equipped with solar panels, determines which buildings in the vicinity are blinded by the panels due to the reflection of sunlight.

Inputs are 3D planar polygons that describe the panel geometries. Furthermore, a surface model of the earth's surface. The algorithm's output would be the locations that are affected by the glare effects.

Who knows algorithmic approaches or software solutions?

I am currently doing an undergrad dissertation where I am measuring habitat fragmentation in Borneo from oil palm plantations (1973-2014). So far I have made my two landcover maps using Landsat imagery (1973 - MSS and 2014 - 8) which was then classified using an ISODATA algorithm. The result is two raster classified raster images with varying class sizes in both e.g. the amount of pixels for the forest class in 2014 is less than in 2014 due to landcover change.

Essentially to quantify fragmentation I need to measure certain metrics and so far I have been able to work out 'Class size area (ha)' and 'Percentage of landscape (%)'. I still need to work out:

I am by no means an expert so these are the metrics I thought would be most appropriate. If there are others I would like to know! Also just to add I have tried using FRAGSTATS but whenever I go to generate the statistics the software crashes and closes down unexpectedly.

I have also tried to download PatchAnalyst for ArcGIS but again had limited success.... Any help would be greatly appreciated.

Kind regards,

Connor.

In theory clasees, we all have learnt about drainage density (DD), which is the ratio of 'total length of stream network in a basin (L)' to the 'basin area(A)'. However, when, we are trying to determine DD of some Indian river basins using Arc-GIS, we are facing some confusions. For instance,

1. We have to define some particular break value in Arc-GIS to get streams of differnt orders. Lesser the break value, higher is the stream order, therefore resulting in a higher value of L, and vice versa. For example, when we set the breakvalue as 500 for a particular basin, we are obatining a stream order upto 7, but if we increase the break value to 1500, the max. stream order reduces to 5 - automatically the L value also reduces. Thus, the same baisn may yeild two differnt DD values, under two aforesaid considertions of break values.

2. We also fixed the theoretically least possible break value , i.e., >0 and obtained a extremely dense stream network with high DD value.

So, my question is, what should be the threshold break value for a particular basin in order to get the DD?

3. From literature, we found that, there are five classes of DD with the following value ranges (km/km2), i.e., very coarse (<2), coarse (2-4), moderate (4-6), fine (6-8), and very fine (>8). However, for 20 river basins across differnt parts of India, we obtained DD values ranging between 1.03 to 1.29, which makes all those basins fall under very coarse category. But, from our visual inspection (one sample bain attached below), it seems to be very less to us.

We want some justification/ clarification/ comment on it.

I'm looking to extract shorelines from satellite images. To find a suitable method I need to compare various methods of automatic shoreline extraction methodologies. If you have any suggestions please leave in reply...

Currently, I am studying a project about electric charge station location selection. I can't find a trial version of ArcGIS Pro for Mac and I don't know if ArcGIS online has the capability to conduct an MCDA project. Is there anybody who has an experience with MCDA with ArcGIS online or can you suggest me a free tool for this problem?

I am geocoding addresses using the Geocoding API from Google Maps. However, geocoding problems appear when the address is based on a specific kilometric point from a certain road. This has also occurred using other geocoding systems like OSM (Nominatim) and ArcGIS Pro.

Is there any standardized way to make Google Maps find the specific location based on the kilometric points?

Thank you for your help!

Has anyone used ArcGIS for 'automatically' detecting lineaments from a high-resolution (5m) DEM?

I was wondering whether anyone was familiar with or knew of any published research papers which looked at automatically detecting lineaments use ArcGIS?

Dear Scholars,

Assume a mobile air pollution monitoring strategy using a network of sensors that move around the city, specifically a network of sensors that quantify PM2.5 at a height of 1.5 meters that lasts about 20 minutes. Clearly, using this strategy we would lose temporal resolution to gain spatial resolution.

If we would like to perform spatial interpolation to "fill" the empty spaces, what would you recommend? What do you think about it? What would be your approximations?

Regards

I am using a NetCDF image comprising 12 subNetCDF images of different duration, as shown in the Figure attached; I tried to average/separate by using every tool, software, and different source, such as the use of Origin as mentioned in this link https://www.youtube.com/watch?v=14-sLHOaaOg&ab_channel=OriginLabCorp. I have used the Make NetCDF raster file tool, which won't import the subNetCDF in batch. It uploaded the images one at a time. I have used ArcGIS supporting tools such as https://r-video-tutorial.blogspot.com/2016/07/time-averages-of-netcdf-files-from.htmland also used python and R codes, but I failed to separate the subNetCDF files. I am working on large datasets. Uploading one-by-one images of multiple parameters with multiple duration will make my work more crucial, typical, and time-consuming. My work requires the final image as a raster file. Please recommend some solution to deal with the issue. Please help me get images at one or an average of all images in one. My work requires the final image as a raster file.

I have a vector layer with the determined polygons and a raster layer that is a cutout of a DEM with calculated aspects. I have tried to use "zonal statistics" in QGIS, but then it only calculates one mean aspect for each polygon and most of the polygons then get a mean southern slope.

The reason I want to have the proportion is to evaluate how much of the area in a polygon is suitable for an alpine species according to northern slopes being preferably unsuitable with longer snow coverage etc.

Dear All,

I am doing demographic and health survey (DHS) cluster base analysis. I created buffers of 20k, 10km, 5km and 2km around the DHS clusters. Now i want to extract/calculate total number of cells/pixels fall in each buffer mentioned above. How i can do this in ArcGIS/ArcMap). I already use zonal statistics as table tool of arcgis but count in that table does not match across various buffers. For example count in 20km is 17 while count in 5 km is 250 which seems wrong logically.

I'm running some species distribution models for seagrass in the Hebrides, and one of the factors I need to include is a raster of exposure (to wind and waves). So far I've found three methods:

Of these, WEMo looked the most promising - using it to model seagrass is explicitly stated as a potential use, but I can't open it as it says I have to bind it to ArcGIS (nothing about this in the manual or online so stuck). SWaN looks interesting, but is far too complex for me and even with the manual I don't really know where/how to start.

So, I'm using the USGS ArcGIS tools, which are easy enough to use. Still, I thought I might as well ask if anyone knows of a better model/software which is relatively user friendly?

Hi

I am looking for a tool that finds Stream Knickpoints (i.e. identify significative slope change in a reach). I need this to properly segment streams for water quality simulations. I found that the KET tool for ArcGIS would do that task (http://topography.csis.u-tokyo.ac.jp/resources/tools_ket/index.html) but it presents errors when I applied their tutorial examples and it seems to be no longer available.

Other options that I found (LSDTopoTools) require Linux.

I don´t know if there is a QGIS plugin for this or a piece of code that help me with these. I would prefer an option that still works in Windows.

Do you have some suggestions? I would appreciate any thoughts.

Thank you

Could someone provide me with a guide/suggestion/paper on how to generate/calculate the relief map of a region from DEM at a given distance (km) (i.e., radius in km)? The radius could be any value of choice. I desire to understand the spatial variation of relief in the region.

PS: Not the traditional hillshade map from ArcGIS/QGIS.

When I was working on entering an equation using Raster Calculator in ArcGIS, and after the execution request, the above error appeared.

Is there anyone who can help me find a solution to this error?

Dear friends

I do have two issues relating to the custom coordinate system in ArcGIS 10.3.

1) When I create a custom coordinate system, it should be saved in some location. How can I locate that transformation I created?

2) Another issue that when I cannot select and apply the custom coordinate system in the project window (under data management tool>> projection and transformation) and, instead, it appears with another transformation system which I do not know.

I would be grateful if anyone suggest a solution to this (small) issue that hindered my project.

I am going to derive the precipitation data from NETCDF files of CMIP5 GCMs in order to  forecast precipitation after doing Bias Correction with Quantile Mapping as a downscaling method. In the literature that some of the bests are attached, the nearest neighborhood and Inverse Distance Method are highly recommended.

The nearest neighbour give the average value of the grid to each point located in the grid as a simple method. According to the attached paper (drought-assessment-based-on-m...) the author claimed that the NN method is better than other methods such as IDM because:

But in my opinion maybe the IDM is a better choice because I think as the estimates of subgrid-scale values are generally not provided and the other attached paper (1-s2.0-S00221...) is a good instance for its efficiency.

I would appreciate if someone can answer this question with an evidence. Which interpolation method do you recommend for interpolation of GCM cmip5 outputs?

Thank you in advance.

We have aerial survey photos taken by a drone. Images are already in GPS - raster format. I would like to analyze (locate and count) structures - specific bird nests in reedbeds. Which would be the best software to do this, either self standing or ArcGIS/QGIS add-on. It would be some kind of software for shape recognition by machine learning.

I have generated a Curvature map in ArcGIS, what exactly is the unit of measure of Curvature generated in ArcGIS?

Planning to use a handy and affordable GPS receiver along with ArcGIS Field Maps for data collection.

I am new to ArcGIS. Could anyone give me a guide line about how to calculate hypsographic (drainage mean) elevation of streams? So far, I have DEM raster, stream shpfile, and drainage basin shpfile set up. 

Thank you!

I implemented the hotspot analysis using ArcGIS which relies on the Getis-Ord Gi* statistics. Based on the information reported on the corresponding ESRI webpage, even if data are clustered the presence of one feature showing a high or low z-score value do not indicates the presence of a significant hot or coldspot. In fact, to be considered as a statistically significant spot, a feature must have a high/low value and be surrounded by other features presenting high/low values as well.

However, what is the exact number of features required to define the presence of an hot or coldspot? two, three, four, etc.? or simply more than one?

Thanks in advance.

Need to compare and contrast the image analysis capabilities and potential of ArcGIS and ERDAS software. Please explain or recommend useful litetature.

I would like to know if ArcGIS could be used to spatial model microplastics in water bodies and if yes, I wish to get any research work done in that area

I need to make a clustering and hot spots of Covid-19 positive cases using ArcGIS. Please help

Hey,

I am trying to georeference an image from google earth using arcGIS. for some reason the anchoring does not come out accurate. I tried changing the angle on GE to be in zenith while acquiring the image and made sure I'm using the correct projection on arcGIS and my residuals are still vary high. any idea how I can improve my accuracy?

thanks !

There is no HSG column in the attribute table . So from where could I drive the HSG please?

Hi everyone,

I would like to create new raster files:

1) Euclidean distance to coastline

2) compound topographic index

3) elevation and

4) local deviation from global

from ETOPO1 data.

I have a bit of an idea that I can do this in ArcGIS. But can I do this using QGIS or R? (or any opensource alternatives).

When applying supervised classification in ArcGIS Pro 2.8.4 the whole image becomes as one class as shown in the video below:

Does anyone know why this issue occur?

Hi, everyone. I am facing a problem with using the Extract by mask tool. When I apply it to a mosaiced image, the output image has strange colours ( in the attachment).

Dears members, I am working on shoreline delineation using landsat 8 OLI,

Could you please provide me a link to download the tasseled cap with landsat for arcgis .tbx extension for arcgis 10.5.

Secondly how to extract the shoreline boundary from landsat 8 images using arcgis 10.5

Thanks in advance

Couldn't find it on arcgis online and neither on govt. backed gis service websites.

Hi,

Can any of you please share me Landsat tool box for ArcGIS 10.1 to fix scan line errors in landsat images?

Thanks.

Are these datasets available through spatial analysis tools like ArcGIS? Are they available in libraries of programming tools like R or Python? Are they available at official websites from the Colombian government? Any reference to the specific links or libraries is highly appreciated.

Hi

Please guide how to create drainage density map of a watershed?

I followed arcgis tutorials from YouTube but it gives a single value for whole catchment.

I need to prepare a map showing different classes

I want to classify my raster file into several classes in ArcGIS . When I click "Classified" in Symbology, ArcGIS stated that "the Classified renderer requires the data to have a histogram. Do you want to compute the histogram"? What does it mean when ArcGIS want to compute the histogram?

I want to make a map that consists of nodes and links in GIS(if in QGIS it'll be better but ArcGIS is also ok).

The information that I only have is this csv file, that contains the link object ID, coordinates of two points of each link, and the uclidean length. You can ignore 'connectivity' tab.

In this situation, can I make the map? If so, how can I? Please please help me :(

I would like to calculate average field size of agricultural fields in the landscapes surrounding my study sites. Calculating field size in ArcGis Pro is easy enough, but when intersecting my landscape buffers with the field layer and then calculating average field size based on the intersected layer, some of my fields are cut off and "made smaller", which will underestimate average field size.

Any ideas on how to deal with this issue? Are there tools in ArcGIS Pro (or anopther programm) that account for/deal with this bias?

I very much appreciate your ideas and suggestions!

Good morning everyone!

I am using the Location-Allocation tool on ArcGIS Pro to locate some biomethane plants in Italy. I followed the tutorial provided by the software but I have some doubts.

At what stage of the analysis should I indicate to the software the layer with the road network?

Is it really necessary to load the road network? Or you can use the road network of the base map?

Thanks a lot to those who can help me.

I am interested in landscape metrics analysis of LULC maps using Fragstats for each grids created using the Create Fishnet tool in ArcGIS 10.2. But I am confused about input data for the whole study and the procedures

Dear All, I have computed the zonal statistics as table using ArcGIS software, the output is attached. I want t know how i can categoriz the digital number. Actually i need the DN value for each district. The output i attached here shows only the sum of the DN but i need to know how many pixels are there in each district and what is the value of pixels in each district. I want to make three catagories of DN i.e. DN between 0 and 10, DN between 11 and 30 and DN greater than 30. Any one who can explain how i can do that. Looking forward to read from you soon. Thanks in advance

For comparison with other dataset, I'm calculating the LS factor using the following formula in ArcGIS:

(1) LS = Power(“flow accumulation”*[cell resolution]/22.1,0.4)*Power(Sin(“slope of degree”*0.01745))/0.09, 1.4)*1.4

but I was not able to find the theoretical formulation of LS it corresponds, I've got the feeling that (1) is the ArcGIS correspective of

(2) LS = (m+1) [ (U/22.13)]^m [sin(slope)/sin(5°)]^n

where U is the unitary upslope contributing area and (2) should be LS factor according to Mitasova et al. (1996) paper.

The following document

http://www.caee.utexas.edu/prof/maidment/giswr2014/ProjectReport/Kim.pdf

seems to support my feelings but in absence of references for (1) in literature I'm not completely sure that (1) and (2) are the "same" formula.

Mitasova H., Hofierka, J., Zlocha, M. & Iverson, L.R. (1996) Modeling topographic potential for erosion and deposition using GIS. International Journal of Geographical Information Science. 10 (5), 629-641.

I have line and point data with elevation, & i need to draw a profile for every 2 km of length of the pipe. Theme is to automate the profile (graph) as the data frame moves forwards? Template is:

1st Frame: Upper Portion (will have a basemap with vector data)

&

2nd Frame: Lower Portion (will the bar chart for the above shown terrain)

Using ArcGIS v 10.8.

Hi, I have approx. 300 radiometric thermal images. I used a DJI's Mavic 2 Enterprise Advanced UAV. I was able to get an orthophoto using the visual light images but I cannot get an orthophoto using the thermal images. I try using Agisoft Metashape Pro, ArcGIS Pro, and WebODM. Any recommendation? A video tutorial or paper will be greatly appreciated. Happy holidays!

Hello! I've recently come across the need to reproject some environmental raster layers from the mercator projection into an area-conserving projection: cylindrical equal area.

Reprojecting in R using the projectRaster function, then writing the rasters as tif files, I'm getting files that are significantly large so that I quickly run off of usable computer space in my analysis (I have approximately 50 environmental rasters).

My question is: is there a way to avoid this significant file size increase? It could be either through saving the reprojected raster in another format that is more lightweight; another equal area projection that through reprojection from mercator leads to lesser distortion/size increase;

Thank you in advance for any input!

Query on research tool

My supervisor told me that there are some ways to extract data using a programming language. I would greatly appreciate it if someone can guide me a little on this.

I have two datasets. One with 9 past cyclones with their damage on the forest, wind speed, distance from the study site, recovery area. Another dataset with future sea-level rise (SLR) projections and potential loss area due to SLR.

I wanted to get the TOA reflectance from MODIS data (Terra surface reflectance, MOD09A1). hence I used preprocessing too. I got the following reflectance values which I suppose are very less than I expected. There are so many zeros after the decimal. Would you please help me to solve this?

(As I was having a problem downloading the data. So I prefer to use this preprocess tool to use the data downloaded directly from the official website.)

Thank you in advance.

Numerous papers talk about creating latilong or lat/long blocks of 1 degree or 2 degrees. Is there a way to do this in ArcGIS? We have nest location data for three species of shorebirds in six states of the US, as well as the location and data for all the weather stations in those six states. We would like to find average temperature during the breeding season in those six states and see if changes in average temperature are correlated with changes in clutch initiation date in the shorebird species. One way we can do this (according to previous studies) is to create latilong blocks and use the data from the weather stations in those blocks where our nests are located. However, we are unfamiliar with how to do this in ArcGIS or if there is another way to do it. Any suggestions are much appreciated!

I am working on future climate projections. I need to extract CORDEX data at specific rainfall and temperature stations. The option "MakeNetcdf to table view" in Arc GIS is not showing results after I execute the operation. Can anyone guide me?

Thank you

I need to create a raster that indexes fragmentation across a large landscape for use in a habitat suitability model.

I used fragstats a long time ago. Is this this still the best way to go. I have access to ArcMap and ArcGIS Pro. for simplicity, something that integrates into these platforms would be ideal.

Thanks for your suggestions

Respected All

The data which is available at https://swat.tamu.edu/data/india-dataset/ , the file named "SOIL_WATERBASE.7z" on this link has only the raster along with "VALUE" and "NAME" of the soil series, which is taken/subsetted from HWSD_FAO,

But the database file require a large number of inputs of different soil properties, for these soil series like, compaction, number of layers, Texture, Bulk density, Available water capacity, Proportion of sand silt and clay, etc, in the dbf file, which has these columns

OBJECTID

MUID

SEQN

SNAM

S5ID

CMPPCT

NLAYERS

HYDGRP

SOL_ZMX

ANION_EXCL

SOL_CRK

TEXTURE

SOL_Z1

SOL_BD1

SOL_AWC1

SOL_K1

SOL_CBN1

CLAY1

SILT1

SAND1

ROCK1

SOL_ALB1

USLE_K1

SOL_EC1

SOL_Z2

SOL_BD2

SOL_AWC2

SOL_K2

SOL_CBN2

CLAY2

SILT2

SAND2

ROCK2

SOL_ALB2

USLE_K2

SOL_EC2

and so on_____________till 10 layers (if available)

The another file named " soil_HWSD_FAO.7z " has its global raster without any information about the soil properties which are used in input database.

I have sub-setted/clipped the indian raster from the global,

although the global raster was missing spatial referencing,

So if someone is sub-setting the same for their area of interest, then you have to manually geo-reference the subsetted image to use it while creating HRU's.

Kindly share if you have any idea about, the source of the soil properties for these soil series.

I want the DEM rendering effect shown in the picture below, but the hillshade made in ArcGIS is not the one shown in the picture. May I ask if you have detailed production process and parameter setting, please let me know, thank you very much.

I am getting an error: "no features found. possibly an empty feature class." while delineating watershed in SWAT from DEM. I am using ARCGIS 10.1 and ARCSWAT version 2012 .

Sometimes the error occur as :

" the watershed with grid code does not have an outlet within it . This is  likely because the outlet falls on an edge of the watershed boundary."  for the same process...

I am using MODIS surface reflectance product MOD09A1. I prefer using ArcGIS and ERDAS IMAGINE softwares.

Hi,

Greetings! Please share with me if you know of any AHP extensions for ArcGIS 10.5. There is one (https://www.arcgis.com/home/item.html?id=bb3521d775c94b28b69a10cd184b7c1f), but it works only for ArcGIS 10.1 and 10.2. Any help in this matter is highly appreciated.

Kind regards

Sohel

The location of DAM has been obtained by using AHP techniques. As a result, I have prepared the dam/reservoir suitability map. Certainly, validation is a very important part of the model. If, any other dam site is not available/ not constructed in the study area. How can we validate? Is there any method or approach?. Furthermore, Is sensitivity analysis is required for the spatial layers utilized to prepare the dam site suitability map?

I m eagerly waiting for prompt and scientific answers to overcome this difficulty?

Thanks

I'm working on a closest facility analysis using ArcGIS ModelBuilder and I want to enable the user to add locations interactively (i.e. clicking on the screen, not using any table or source layer).

In other words, I want something like 'Create Network Location Tool' or 'Create features' in Network Analyst and Editor toolbars, respectively. But how to incorporate it into ModelBuilder?

I need a global above-ground biomass raster dataset from which I will subset a certain area of southeast Asia. I tried to use GEDI data but couldn't work out how to use this dataset. Is there any other data set that will serve this purpose? or can you point out how can I use GEDI AGB data?

I want to calculate the distance between points and lines in ArcGIS. I need to use the parameter of gravitation direction. I need to compute the direction from the center of the forest plot to the nearest road, but it is important for me to give weight on the direction of gravitation.

I am running Geographically Weighted Regression (GWR) on a categorical dependent variable so my model is basically a Geographically Weighted Logistic Regression.

I have multiple independent variables, some numerical and some categorical.

While interpreting the results of numerical variables is straight forward, I want to know how to distinguish the reference level of the categorical independent variables and how to interpret those?

let's say I code males as 0 and females as 1. so the coefficients should be interpreted for females as they are coded 1? what if I coded males as1 and females as 2?

Presently, QGIS is also being used widely in various GIS projects, still companies are looking for experts in ArcGIS. Can we expect that this scenario will persists?

Reword the actual sentence.