ESRI ArcGIS - Science topic

I am processing World View 3 Satellite Imagery and get following error message while creating DSM or orthomosaic. Any suggestion ?

I have a drainage network polyline feature the course of which is structurally controlled. To determine the dominant direction trends of the streams I need to plot a rose diagram. However, I am unable to derive directions of these polylines. There are 3500+ streams present in my AOI.

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?

Looks like DEM data with 10m resolution is available only for the United States in USGS, SRTM, ASTER, and other sources. Are there any other open data sources that provide 10m resolution DEM images- for India?

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.

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'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 to show the line's length while drawing a polyline in ArcMap. How can I that? (not in ArcGIS Pro).

I have downloaded IMD Gridded data (0.25 by 0.25 resolution) from the IMD website for my study I need monthly rainfall data. How to convert daily gridded data to monthly and seasonal rainfall data

I have some geospatial data points (X and Y in decimal degrees) and the concentrations of a certain parameter for each point. I want to create a heat map to show the density of the concentrations not the density of data points. In Youtube, I found several tutorial for how to create heat map to show the points density. But I want to show the concentrations density in my case.

By the way, I'm using Qgis to create the map.

I appreciate if you share any information or experience in this case.

What is MODIS's default Geographic Coordinate System and projected coordinate system? My study area is Bangladesh. I found the image distorted (the upper portion is bent towards left and lower portion is bent to the right. Pics attached). How can I project them to Geographic Coordinate System: WGS 1984 and projected coordinate system: WGS 1984 UTM Zone 45N ?

I already have a Basemap in my document, but when I try to add another one my ArcMap crashes.

This also happens if I try to add a new Basemap in a new document.

Does anyone solved this problem, or knows how to solve it?

Thank you,

I 'm calculating AWC (Available water capacity or available water content) trough ArcMap in Relation to Soil Texture and Organic Matter (showed in raster type of data) with help of Raster Calculator and Map Algebra expression con().

Soil texture is calculated via QGis (SAGA) tool Soil Texture Classification. In soil texture layer from 100 to 200 cm of soil depth aformentioned tool find texture class with number 4 (Sandy clay) which is unknown to this clasification:

Can anyone tell me range of AWC for this type of soil texture class with relation to Organic Matter?

I have a shape file containing almost 3000 points and a delimited text layer with almost 500 points. What I want to do is to calculate the distance between each 500 points and the nearest point to it in the shape file. Therefore, 500 distances should be calculated at the end. Could you please tell me what is the best way to do this in Qgis?

I would highly appreciate your help.

I have two DEMS, one which includes the bulk of the country, and the other fills in the gaps. I basically want to use the one to fill in the gaps of where values = 0 in the other DEM. One question on here was answered with " create a mask so that all cells that have NULL-values receive the value 1 and all other values are assigned with the value 0. Then overlay this mask with the old DEM-layer by using the multiplication function. Finally, overlay again the output layer with your current DEM-layer to fill the gaps, but use the sum-function this time instead of the multiplication-function.". But I am unaware on how to create a mask? Can anyone offer advice or a better method? I tried to SetNull and remove all of the 0 values from the main one, but there are some spots which have the value "0.0000006" which are also gaps. Can I create a mask which removes values 0-1? and then somehow overlay the other? can I just remove the null values and mosaic to new raster?

To clarify its two DTMS (one older than the other), same cell size, same coordinate system, but the main one has gaps that I want to fill in with the other one.

I have attached an image of the two DEMs. one is the lighter one, and the one at the back is the "filler" DEM. As you can see there are holes in the main DEM itself, and the background one also includes island that I want to include. I need to remove null values from the main one then fill in the empty space with the background DEM.

Thank you for your help in advance!

It seems impossible since most of analyses are based on 3x3 cell neighborhood but I would like to hear your experiences. I know that some hydrodinamical models like TELEMAC are able to perform this.

Cheers

A local fault shapefile prepared by a public academic institution was required to complement a qualitative analysis. It was not possible to access a study or technical report documenting the data obtained, so the only reference is the file itself. How should it be reported in the references list?

I have seen this style of map images repeated in several articles, but was never able to find the software required or a method to reproduce them. Does anyone know how to obtain them?

Dear all,

I am trying to replicate some results from a publication. There, one of the datasets they use is WISE30sec map (available for download here: https://www.isric.org/explore/wise-databases). My problem is that even tough they state the following:

I am unable to perform the above-mentioned join as I fail to find the grid cell identifier (NEWSUID) when using the Add Join function. ArcMap only shows the fields "ObjectID", "Value" and "Count" and none of them coincides with values shown at the tables I am trying to access. I have tried to copy raster and build attribute table but it didn't work. Also, when I put it in R, I cannot see these attributes that the raster is supposed to have.

Thank you in advance.

What is the most suitable interpolation method (IDW, spline, kriging, natural neigbours) for evenly and dense distributed points (attached picture .jpg)? and if you recommend any can you explain shortly why this method. Thank you.

MODIS has surface reflectance product too from where we can produce land cover output after supervised classification. From my knowledge of concern Landsat, Sentinel etc. only provide surface reflectance products. Later land cover is derived by us. But why does MODIS provide land cover product (derived from surface reflectance) by itself? Is it because their spectral resolution (250m, 500m, 1000m) is lower than others (10m, 30m) and so a land cover output derived by us will have less accuracy?

For my thesis, which thematizes a GIS-based industrial site selction in Europe, i am in need of a method to integrate all of the european NUTS 2-regions (253 units). The methods which i had in consideration (PROMETHEE, SMART) seem to usually compare very few scenarios.

Especially the part of rating my criteria is creating trouble because i haven't found a structured method for my issue.

How to calculate Stream Power Index (SPI) and Topographic Wetness Index (TWI) in Arc GIS?

Looking for syntax

I have a road shapefile in polygon format and I want to take the centreline and end up with a shapefile in line format because I need the road's intersections.

Thank you in advance!

I am facing problem to cut a polygon shape-file from raster image using "Extract by Mask" tool.

My observations are points along a transect, irregularly spaced.

I aim at finding the distance values that maximize the clustering of my observation attribute, in order to use it in the following LISA analysis (Local Moran I).

I iteratively run Global Moran I function with PySAL 2.0, recreating a different distance-based weight matrix (binary, assigning 1 to neighbors and 0 to not neighbors) with a search radius 0.5m longer at every iteration.

At every iteration, I save z_sim,p_sim, I statistics, together with the distance at which these stats have been computed.

Because with varying search radius the number of observations considered in the neighborhood change, thus, the weight matrix also change, the I value is not comparable

Hi there,

I have group of pixels that I created by region group tool and I would like to measure the length and the width of each pixel group. My main goal is to extract the structure of each pixel group i.e whether it is linear or other pattern.

Would you recommend any tool for that?

Thanks in advance

we are considering to develope the SUSTAIN model adding some new functions. the officia website on USEPA applied the source code of its interface and simulation engine, but it's an extension tool based on arcgis 9.3.1, we have no idea to use the dll files, got from source code, with arcgis platform.

asking for help sincerely, by a rookie.

moreover, is there any possibility to transplant this model to newer version of arcgis 10.x, that could be a "big" project which USEPA was not willing to do.

Hi, I am in a problem with this matter. When Masking or Clipping a DEM file and Landsat image with the same shape file in ArcGis, this shows different column and row numbers in the properties for DEM and Landsat composite or land cover map.

The same Column and Row number is required for many modelling aspects.. Can anyone tell me why this is happening?

Thanks

Is it plausible to use NDVI along with other regular bands for image classification related data processing? Recently, I came across a comment that RED and NIR band might interfere with NDVI or vice versa during the processing. I am working on a project where I want to classify healthy and stressed crop patches in fields using satellite imagery, and I am using all four bands (RGB and NIR) along with NDVI to train the model and classify the satellite images. For the classification, I am using Random Forest algorithm.

I have calculated soil erosion by RUSLE model,

but now I want to calculate the SDR rate

please suggest !

Can anyone help me in finding the Meghalaya state shape file with 11 district borders. The available shape file contains only 7 districts.

I'm trying to plot U and V vectors in ArcGIS. I followed the method:

In which, point no. 7) Choose <expression> in the drop-down list was not available in 9.3 version. 

To do this in other way, I added a field in the attribute table "Rotation".

Using Filed Calculator, I tried the 'function' written in point no. 9) 

9). Specify one of the following expression:

Oceanographic Convention: (180/3.14) * Atn2([u],[v])

Meteorological Convention: (180/3.14) * Atn2([u],[v])+180

It was failed due to error in the code.

What is the correct code to write the "Oceanographic Convention: (180/3.14) * Atn2([u],[v])"?

Or is the any other way to plot in Arc?

Thanks.

I have a (1) polygon/shapefile of administrative boundaries

and a (2) a raster with different categories (e.g. 1, 2, 3, 4, 5,)

I would like to determine the area of the raster (only category 1) within the polygon/shapefile .

I have tried converting the polygon/shapefile into a raster (feature to raster too, with similar pixel/grid sizes) and combining the 2 rasters. I then estimated the area by looking at the resulting attribute table.

However, I'm not too sure if this is an appropriate way to do this.

Thus, is there a more appropriate/easier method?

I would like to conduct unsupervised classification to identify different shoreline typologies. How will I be able to extract only the shoreline imagery data from a Landsat 8 multispectral image on ArcGIS to conduct unsupervised classification into different shoreline typologies?

To plot the graph: My question is should i use average ndvi >0.5 to capture reflectance of vegetation only excluding soil and detritus?

Or simply use average ndvi without a need for it to be >0.5?

I was trying to download Landsat 8 scenes for 3-4 years by using USGS Bulk download application, but I think its download speed is too much low than other download managers, even the internet download speed was 70-101 Mbps.

Then Tried the same with IDM and FDM they are working perfectly with individual scenes. As Landsat 8 data does not support resume option (may be in Batch or Bulk) so the batch download was not working out.

But adding individual scenes takes a lots of time in selection, so I just wanted to know that is there any substitute for that ?

Hello everyone,

I work with the digital shoreline analysis system (DSAS of USGS) to my thesis, in the process i have a error with the calculate change statistics. The program say: "Unable to find output file 'C:\Users\...DSASCore.out.xml'

Does anyone know what the solution is?

Thanks!

I want to build road network datasets from an existing road polyline shapefile to calculate network distances. Can I use this data to create the shapefile-based network and later add the network attributes e.g. direction (FNode, TNode), travel time etc., then digitize the junction points and turns, or should I digitize it all over again on a new empty network dataset?

I have accidents data that I would like to geocode using ArcGIS/ArcMap, however, I don't have the exact addresses of the location of the accidents.

The data that I have includes 3 columns of the location data:

(1) On-street

(2) At/Between street

(3) Between street

Which derived into, accidents that happened at (1) between streets (2) and (3).

I could easily geocode (1) and (2) to get the intersection of which the incidents happened, which is true for some data, since (3) is blank, however, most cases have (3) in which accidents happened at street segments instead of intersection.

Hopefully will be able to figure this out, thank you.

I would like know the methods to extract shoreline using LANDSAT image utilizing ESRI ArcGIS software:

-To calculate shoreline erosion rate

-To draw historic shoreline changes

ArcGis 10.2, 10.3 etc. I will be very thankful if someone send it to me.

Can you please guide me with the steps to prepare a geological map with elevation. Note: I have the shape file of the geology and DEM file and result map would be like the attached one.

As part of a research work, I am modelling Land Use/Land cover changes over the span of 4 decades on a 40 km² watershed in a rural area located in sahelian climate (west africa). I am mainly interested in three types of land units, namely bare soils, cultivated soils and vegetated areas. I have been able to map them accurately enough using remote sensing analysis of Landsat 5 TM/Landsat 8 OLI Images. As such, I now have land cover maps for the watershed at four dates, 1985, 1995, 2007 and 2017. I am now looking into modelling the changes using a set of driving factors (yet to be identified) and assess land cover changes. I ran into land use simulation models mostly based on Cellular Automaton (CA) concepts such as Land Use Sim (http://www.landusesim.com/landusesim-land-use-modeling-simulation-software/) but it seems to be a paid software. Are there any other free simulation software/packages one can point me at ? Preferably, something that can be easily tight to a GIS environnment (ESRI ArcGIS for example) for easier raster/vector processing.

Thanks in advance.

Roland.

Hello, I am student of physical land resources:soil science. I want to develop my career in the field of GIS and Remote sensing application on soil science, agriculture, land and water management and hopefully environmental assessment.

I am now trying to learn theories behind GIS and Remote sensing, However I need to learn the software and tools. I am asking to the respected scientist communities please to suggest me name of most useful software. I have found QGIS is a free one and is a very powerful one unless it has some lacking other than ArcGIS.

I also found ERDAS IMAGINE and ENVI are both paid one, but some people say ENVI is far better than ERDAS.

Hi all,

I'm interested in marking employment status for all (626) Indian districts, in STATA. I'm trying to get the shape file and is currently inaccessible.  It will be of great help if some gives idea on how to get it.

Thanks.

I'm about to analyse habitat selection in a owl inhabiting coastal and maritime heath habitats. I have GPS-positions and want to check if the owl are more likely to stay at elevations in the terrain. I have digital elevation models (DEM) for the area and want to calculate habitat openness. I tried Package 'horizon' - cran.r, but got some strange results. Anyone that could help calculating habitat openness from a digital elevation models (DEM)?

The two DEM files could be downloaded here: https://www.dropbox.com/sh/ct02cns54c9i1wo/AAAaAT-h-F8L-FA8npm6flFoa?dl=0

I have used AHP, Frequency Ratio (FR), and Fuzzy Logic (FL) to create land suitability maps in the GIS environment. Do you know other methods?

Searching for a tool/plug-in/add-on/software for visualizing flow network from flow direction. I tried with ArcView 3.X but it is difficult to use that one. I also tried with Cell Tool and it didn't work in my case. Actually, anything with some advanced feature is fine for me. Any suggestion regarding it will be highly appreciated.

I have attached one map prepared using ArcView 3.3. Thanks in advance.

I have done rediometric correction, TOA which was used for a tasselled cap transformation on Landsat images with 30m resolution. Now i want to use regression modelling to relate the tasselled values (greeness, wetness and brightness) to impervious surface values from digitized high resolution images. i am using this approach to quantify imperviousness in an urban area, but i am stack at how to apply the regression model (in Arcmap 10.1) to achieve this. I will be grateful for your suggestions

In our project, we did traffic study for around 8 roads and we want to extrapolate that data to remaining roads(approx 50 roads). Is it possible to extrapolate data among line features ? In this process what are the attributes we have to consider for extrapolating ?

Hi everyone,

For a global scale project I'm working on right now, I'm wondering if I can use Net Primary Productivity data as a proxy to potential post-fire recovery. My basic thinking here is that pre-fire NPP conditions help post-fire recovery, i.e. facilitates it in the case of high NPP levels, which would mean that existing natural conditions help vegetation to thrive.

Obviously, many other factors condition post-fire recovery, but I'm looking for references that may validate or invalidate this thought. I was not able to find anything so far. Any insights?

Steps to WGS1984 ASCii file project to Kertau_RSO_Malaya_Meters ASCii file. Been trying but still not projected well.I cannot open in FMP stated that this file has no projection. Seeking an answer from all experts and professors. Thank you and appreciate your feedback.

I have also attached my original file for reference.

I have soil contaminant samples collected at different depths/layers. I generated a contaminant surface at each depth/layer using ArcGIS krigging tool. However, I need to have a vertical feel of this contaminant across layers and which I think I can achieve by interpolating the values across the different layers. As far as I know ArcGIS can't do this. So, I will be happy to know any freeware I can use to achieve this. Many thanks.

When I geocode large files in ArcGIS 10.3, I receive the following error, “There was an error trying to process this table.” In researching this issue, it says that one cause may be because the file is corrupt. However, this error goes away when I just cut down the number of cases I’m geocoding. Is there an easier fix for this issue?  

Hello all,

Can anyone tell me the right procedure to drape an image over Digital Elevation Model.

I have elevation and potential field data ..i need to draw a 3D view of potential field data and draping the image over DEM to get its 3D view (like i have attached ...the figure)

Please help..

Hi

I'm working in the spatial analysis of a fragmented forest in a human dominated landscape and I'm looking for a tool to calculate the minimum distance between polygons of the same shapefile in ArcGis.

I have tried already with the "Generate Table Near" tool, but it requires that the polygons are separated in different shapefiles.

thanks to all 

I am trying to import HDF files of GPM  ka and ku band in  ArcGIS but they lack the spatial information and come as a straight line any suggestions for correcting the projection of the said file i have attached the screenshot after importing the data in ArcGIS and the data file itself also.

These following data are used for flood inundation modelling as link below.

Hi all,

I would need to calculate the percentage of ice-free area in a certain radius around each of about 200 sampling points in Antarctica. I guess this would be a similar approach as to calculate vegetation cover etc.?

A long time ago I learned some GIS basics using Idrisi, but I haven't used it in 7-8 years and it was very basic. Now, I quite urgently need this data (2-3 weeks, but the sooner the better :) ).

Therefore, any advise is welcome to get me started.

I have the possibility to use ArcGIS and QGIS.

I came across Quantarctica for QGIS, which might provide the map. Any other sources for georeferenced maps of Antarctica?

I guess I can then plot the samples' coordinates, but I then have to manually delineate the ice-free regions by drawing polygons? Or are there layers available giving the ice-free surface or conversely, ice coverage, such that I would only need to detract this from the circle surface?

Can such an analysis be automated?

Sorry for these probably very basic questions. If you can provide me with a good crash-course tutorial (on GIS in general or a similar problem), that would be very welcome too :)

Thanks in advance!

Bjorn

Hi, this site from ESRI explains the curvature, my question is about the profile curvature. They say that positive values represent a concave cell, were the flow will be accelerated. Negative values indicates a convex cell, and flow will be decelerated. I know other software’s use different signs but the logic of the acceleration shouldn’t be the contrary?I thought that a concave cell would in fact decelerate the flow!! probably read that in other sources but i need something absolutely correct to cite..

Which is right (without comparing magnitudes) a concave surface accelerates or decelerates the flow?

Is this the cell size (x, y) in the data source tab?

Aside downloading ASTER or SRTM DEM, is there anyway I can derive a DEM from a particular study area?

Dear Researchers and Academics;

I work on the 100% renewable power Global Grid subjects. I am interested in the locations of very large and large renewable power plants.

During my research, I define and describe the importance of the soil conservation regions, water conservation regions and forest conservations regions. These regions have to be untouchable (no settlement, no concrete, no metal, etc.; soil conservation only for agriculture, water conservation only for clean fresh water, forest conservation only for forests). These regions should be large and very large sites.

I thought and assumed that the international governing bodies (e.g. the United Nations) had already worked on these topics, defined, decided, and published a Global Soil Conservation Map (worldwide protected sites)‏, a Global Water Conservation Map‏ (protected lakes, rivers, underground water, etc.)  and a Global Forest Conservation Map (protected forests) for large protected areas agreed upon and published by international consensus (like by the United Nations).

All authorities (regional, national, international) have to obey the borders of these defined and published large protected areas.

I could not find any official map (a map for soil, a map for water, a map for forest) yet.

Can you please send me a Global Soil Conservation Map‏, a Global Water Conservation Map‏ and a Global Forest Conservation Map, if there is one for Global Soil Conservation‏, one for Global Water Conservation and one for Global Forest Conservation.

If there are GIS files for these maps in some formats such as for Google Earth, ESRI ArcGIS, they will be very useful for my research.

I would like to thank all of you who contribute to this question in advance.

Best Regards

Burak Omer Saracoglu

Is it possible to create a 3D geological model using ArcScene in order to help reserve calculation/estimates ?

I have calculated EVI of IKONOS and World view-2 image using ArcGIS 10.2. but I can't understand whether the result is correct or not. Can you help me guys to extract values after calculation and check the results?

Hi everyone,

I have a problem with the following: I have altered my raster .tif resolution in ArcGIS and again tried to convert it by ARC toolbox to ASCII (asc) format. So i confronted an error during this process with the name of "ERROR 010267: Syntax error in parsing grid expression. Failed to execute (RasterToASCII)." Can anyone give me a mind regarding this? How can i fix this?

I'm trying to calculate the Leaf Area Index (LAI) of different vegetation species in each state in the US and I'm using a netcdf (.nc4) raster file for the LAI and a usual shapefile (with polygons) for defining the state boundary. I converted the net cdf file into a raster file using the "Make NetCDF raster layer tool". I'm using the Clip tool (< Raster Processing < Raster < Data management tools < Arc toolbox) in the arctool box to clip the raster layer and the polygons. So in this case, my output extent are the states that I choose from the shapefile and the input raster is the raster layer of course. I also checked the "Use Input Features for Clipping Geometry" option so that the raster dataset is clipped onto the perimeter of the shapefile.

Here is my question: Sometimes, there are additional pixels that are created in the output raster dataset, that are actually not present in the original input raster layer. And these pixels also have a value associated with it, which is a cause of concern since some states which should actually have a zero value in it, have a random number in the output file.

Could someone explain what's happening or the possible reasons for this?

Thanks!

I'm trying to determine NDVI of a forest using LANDSAT 8 OLI image. Before that I need to do atmospheric correction. And I want to use ArcMap for this process.

I just started to do my master's thesis, I want to analyse urban flood with ArcGIS, and just began to choose available models. I found the above four in papers, I get confused,

1] are they all models or software? what's their relationship with ArcGIS?

2] Which is most suitable for urban flooding modelling and what should I consider when choosing a model?

I Want to map flood extent using Machine leaning (DEcision tree) technique in ENVi. However, i'm not sure what parameters in the SAR image to define as the rule for initial classificstion.

For example if i was using Landsat or SPOT MS images i could define indexes such as NDWI or some band ration and set a rule.

Other data i intend to include are:

DEM (Elevation), Slope and Aspect

Land cover/use

Hydrology: Distance from river

If someone can help draft a decision tree based on these informationand explain the reason, i would appreciate that.