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1answer
12 views

Define polygons with structured data points

I am doing image processing and I get some scatter points (blue) now, filled with random points (red) on it. I want to find the random points lay inside scatter blue circles. So I tired with MATLAB ...
0
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1answer
16 views

How to remove cloudy pixel from MODIS NDVI (MOD13Q1)

I am using MODIS NDVI product (MOD13Q1) for the vegetation changes study. I want to remove cloudy or bad pixel from MODIS NDVI data. I am not getting any suitable method or software or any program to ...
6
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5answers
657 views

Estimating river Channel Width using Python/ArcGIS/MATLAB/R?

I am trying to estimate the river channel width from digitized polygon or poly-lines shapefiles. To do so, I converted poly-line shape files to points.shp at regular intervals (at 1 cm). Later, I ...
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1answer
14 views

PSO for solving shortest path in matlab

I crate a file that represents 16000 edges with information of start node, end node and cost in a table. In MATLAB i want to solve shortest path with PSO algorithm. How i can solve it?
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1answer
241 views

Maintaining spatial integrity of Matlab matrix with missing data

I am working with MODIS Terra imagery (MOD13Q1). I am currently trying to compute the autocorrelation structure of the pixels in an MODIS NDVI raster. The problem is that I have clipped the original ...
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0answers
16 views

Merging multiple netcfd files into a single file

I have rainfall outputs from a climate model on daily basis for about 90 years. I am looking for ways to merge multiple netcdf files having same variables for different time periods. Such as prec_2011....
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1answer
27 views

ArcMap highlight features from code

I have a shapefile of lines containing an amount n of elements. I exported these features and analyzed them with another program (Matlab), which provided me as an output a row vector of length n ...
1
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1answer
3k views

importing shp file in matlab

I have digitize 3 rivers on google earth and converted into shp file to use in matlab. I have checked the shp file in Arcgis and they are working. But while opening in Matlab, matlab shows some error. ...
2
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0answers
47 views

Hot Spot Map in ArcMap and MATLAB

I've tried out the Hot Spot Map tutorial for ArcMap, which is working just fine, and I'm now starting to make some modifications so that it fits my data sets. Instead of aggregating the points as in ...
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0answers
36 views

Difference Google map vs shp in Matlab

I am new in GIS however I already has spent a lot of time trying to solve my problem. My final goal is to have a list of maps in shp-standard for simulations. I did the following step: 1. I found a ...
2
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0answers
58 views

Set NaN values to Transparent in Matlab 'geoshow' function?

I am trying to plot rainfall values in MATLAB using geoshow function. NaN values should be transparent in the map. However, the plot I am getting comes with dark blue color for NaN values. I have ...
1
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1answer
258 views

Matlab array to KML

I am trying to use the KML toolbox for Matlab in http://www.mathworks.com/matlabcentral/fileexchange/34694-kml-toolbox-v2-7 to create a KML file from a Matlab array to be shown in Google Earth. ...
2
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0answers
51 views

Publishing Linked Datasets Format [closed]

This past summer for research I was working on linking the NOAA Rivers Database (http://water.weather.gov/ahps/forecasts.php), The National Atlas Lake Database, and the the USBGN datasets so that ...
3
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3answers
261 views

Flow Accumulation Python or MATLAB Script

does anyone have any resources for scripting the D8 flow accumulation in Python or MATLAB after obtaining the flow direction values and filling in 'sinks' and 'flats'? I am trying to understand the ...
1
vote
0answers
138 views

Creating spatial plot with colored polygons in MATLAB from shapefile?

I have a shapefile of that has 1800+ polygon features. Each polygon has unique value. How to create a spatial map for visual interpretation. Here is what I have tried in MATLAB. clear all; clc; ...
1
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0answers
53 views

Georeferenced Image Overlay and export to new image

I have two Geotiffs (one satellite image, one clipped image). I want to put the clipped image over the satellite image, because it shows flow velocity from this shown glacier (see image below). I ...
3
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0answers
162 views

Converting LIDAR based measurement to UTM coordinate? [closed]

I have lidar based measurement with azimuth elevation and range, I would like to convert this data to UTM coordinate. I know the position of the lidar in UTM coordinate system, so I developed the ...
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0answers
23 views

Evaluating accuracy of registered images

I am performing image registration by extracting SURF features from 2 multi temporal satellite images, in Matlab, as explained here. The steps provided seem to work great for me, and I can visually ...
2
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0answers
33 views

Converting u and v from WGS84 to NZTM2000 - Do I need to do vector conversion?

I have u and v wind component values in latitude and longitude in WGS84. I want to convert this to NZTM2000. I've converted the lat/lon in ArcView - (and will try in R) - but do I need to also do some ...
3
votes
1answer
367 views

How to add a map created in QGIS to a Matlab plot

I am generating a number of plots in Matlab. I want to overlay these over maps I have created in QGIS. I thought the best way would be to import the maps as a geotiff into Matlab and then overlay my ...
3
votes
1answer
589 views

Spatial Interpolation Methods like PRISM

I am looking for some kind of software (free software) that allows me to make an interpolation like PRISM software. The interpolation used in PRISM is a local regression and accounts for ...
2
votes
1answer
339 views

How to label feature of shape file on the color map in matlab

I am trying to make color map from text file data.I am using geoshow to call shape file of the region and to set it as back ground of the color map.My shape file is of the country. I have digitized ...
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0answers
17 views

Arrangement of vectors and matrix in text file?

My ASCII file has a vector of latitudes, and the indices of those latitude values tie latitude values to the data sharing the same index. That is, if given: latitude[x=0,1,2,3] = 10, 20, 30, 40 ...
4
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1answer
118 views

Obtaining sink morphometry from local minima points

I am working on LiDAR data from GIS and R and I want to extract landforms from the DEM. I have found a method to obtain local minima points of my LiDAR data. However, I would like to obtain the ...
2
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1answer
118 views

Spatio-temporal statistical analysis

I need to perform an anomaly analysis in both space and time. I have 4 data parameters: latitude, longitude, time and temperature. What I’m trying to do is to find temperature anomalies that are ...
1
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0answers
132 views

How do I account for changing latitude with a spatial filter?

I'm working with data in latitude/longitude grid form in a non-GIS specialised package (MATLAB) and wish to apply spatial filters to it. As this data contains a broad range of latitudes and is ...
1
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0answers
151 views

How to represent the time(weekly/monthly) variationof a polygon map using one image?

I have a base map made up of three hundred polygons, Each polygon has lots of attribute values(For example, each week/month get a value). But I only want to draw one picture(due to page limitation) ...
3
votes
1answer
67 views

How to transform unknown coordinates?

I have two lists of coordinates in lat/long format which are showing the same points but in different coordinate systems. I need to find the corresponding points in two datasets using distance but ...
1
vote
1answer
445 views

Using GDAL inside MATLAB in Ubuntu

I'm trying to use gdal_rasterize inside MATLAB via UNIX or system MATLAB command system('gdal_rasterize'). Despite this command working in my console terminal, I get the following error inside ...
0
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0answers
27 views

Time Difference of Arrival

I am trying to implement indoor positioning system in Matlab. Does any one know any simple method to find the time difference of arrival.I have 6 references and one target.Need to find the time ...
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0answers
278 views

Matlab code to calculate SEBAL Model

I am working on an article and I want to find a way to calculate SEBAL model.I have find an article(this) with have a matlab toolbox named EVAMAPER but could not find any download link of it, Does ...
0
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1answer
65 views

How to create grid from 2 separate images of latitude and longitude

I have two separate images of latitude and longitude, and want to create a grid from them so I can assign it to my Non-Geo referenced file... How can I create it, particularly in Matlab... But other ...
5
votes
1answer
6k views

How to convert ESRI grid file to ASCII format, or otherwise import into matlab

I need to import a climate map downloaded from WorldClim into Matlab for manipulation with the mapshow command. I am comfortable reading in ASCII grid data into matlab, but this format is not ...
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0answers
67 views

how to use a particular output from previous code in my next code in matlab [closed]

I have written a code in matlab and there are several outputs. I have to use only one of the output(containing latitude, longitude, and one parameter) of these several outputs in my next code. Can ...
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2answers
888 views

how to calculate area of triangles formed by delaunay triangulation

After applying delaunay triangulation 160 triangles were formed. How can I calculate the area of each triangle using Matlab?
1
vote
1answer
190 views

how install shapely on windows so it can be imported from matlab?

i'm on windows 7/64. shapely doesn't offer windows installers on their pypi page, even though they seem to have recently (github issues 104 and 109 -- i don't have the rep to post links. their pypi ...
0
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1answer
116 views

Connect MATLAB to cartoDB using Database Explorer?

I set up a database on cartoDB. I'm trying to use MATLAB to connect to the database using Database Explorer. I've downloaded the PostgreSQL driver. MATLAB asks for connection Parameters: Server ...
1
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0answers
30 views

To filter the wrong data of point positioning

I have collected GPGGA data by Novatel OEMV receiver in static single point mode. I have so much data (GPGGA format) and I want to get the static point axis by averaging all data. But some of the data ...
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0answers
101 views

Wavelet analyses of ndvi using python or matlab

I want to carry out a wavelet decomposition and regression analyses on my NDVI data to see the relationship with other climatic factors like precipitation, temp. What kind of software is best for this ...
0
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1answer
930 views

Trilateration algorithm code issue in Matlab

I am currently using the access point (Routers)as reference nodes and wifi chip(as Unknown tag). So i want to detect the position of unknown tag using 3 wifi access points as my tag can scan the ...
1
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0answers
63 views

How do I compute uncertainties in the positions transformed using Helmert transformation?

I am familiar with Python, MATLAB and Mathematica. My data is given by Cartesian coordinates (positions in X,Y,Z (meters), standard deviations XX, YY, ZZ (meters) and a correlation matrix (XY, YZ, ZX)....
4
votes
1answer
563 views

Dividing a geographic region

I have a certain geographic region defined by the bottom left and top right coordinates. How can I divide this region into areas of 20x20km. I mean in practial the shape of the earth is not flat it's ...
0
votes
1answer
518 views

How to convert GeoDa .GAL or ArcMap .SWM file to Matlab (.dat)?

I want to convert a spatial weight matrix from either ArcMap (.SWM file) or GeoDa (.GAL file) to an .dat Matlab file. So far, I only found the STATA package spwmatrix to do this. But the command line ...
1
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0answers
133 views

Auto generate waypoints for a map

I am working on a project where I need a function which generate way-points considering the obstacle in the area. For example, if a shoreline world-map is given and the requirement is to generate 100 ...
2
votes
2answers
1k views

Conversion of Latitude/Longitude to different map projection

I have two m*n matrices coming from a WRF-ARW simulation: one exclusively with longitude values and one with only latitude values. For both matrices I know the originatin projection (lambert conic ...
1
vote
0answers
218 views

Retrieving Aerosol Optical Depth (AOT) from Landsat multispectral data

I need to retrieve Aerosol Optical Depth from Landsat multispectral datasets. Has anyone successfully tried something like that before?
1
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0answers
427 views

Calculating distance in m in xyz between GPS coordinates that are close together

I have a set of GPS Coordinates and I want to find the speed required for a UAV to travel between them. Doing this by calculating distance in x y z and then dividing by time to travel - m/s. I know ...
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0answers
96 views

'Out of bounds' Error in profile51 function of matlab

I am trying to Extract long profile data in Matlab. I have followed the steps of this pdf. Now, in Matlab I passed the function profile51(‘file_name’, ‘arcmap_directory’, ‘matlab_directory’, ‘n’); ...
2
votes
2answers
467 views

How to reduce the resolution of satellite imagery data for use in MATLAB

When I am using the 4-band multispectral data for NDVI calculation, after successful completion of runtime, it shows some warning message like "Loading 17%..." How should I rectify it? Should I do ...
0
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0answers
92 views

Bi-Weekly NDVI data into monthly Datasets

I have NDVI data in both Ascii Grid format (0.250 degrees resolution) and raster format twice a month like: ndvi1981_07a ndvi1981_07b I would like to combine these bi-weekly values (average) into ...