Questions tagged [masking]
The masking tag has no usage guidance.
196
questions
1
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1answer
23 views
Exporting masked image?
In this script, I take an image and mask off everything below certain elevation. The result looks really interesting as one can still see the names of the towns and roads where the image is masked ...
0
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0answers
9 views
Masked array fill value getting changed
I am using the following code to mask the clouds from Landsat image using
QA band. I am facing the strange issue as you can see I have 2 print statements in my code which prints the fill_value of ...
0
votes
3answers
29 views
Create a mask out of a raster layer
I have a raster file (TIF file) and want to use its extent as a mask. I need this mask to be able to extract other shape files /raster files by this mask.
How can I convert my raster file to a simple ...
2
votes
1answer
34 views
Rasterio Write Masked Array to TIFF - Shape write and read indices are wrong [closed]
I'm clipping a raster to a shapefile, which returned a masked array, and my goal is to write that masked array to a new .tif file with the correct metadata. I can view the masked array and it looks ...
0
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0answers
18 views
Clipping an ImageCollection with a raster image instead of a polygon in Earth Engine?
I'm trying to extract NDVI time series values from MODIS, but my ROI is a raster file, not a polygon. It's big and has lots of small pixel clusters, so if I convert it to polygon, it's quite heavy and ...
-1
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0answers
28 views
Creating segmentation masks for high resolution images?
I have some very high resolution satellite 30cmx30cm images. I am trying to label some things in the images using polygons or masks.
How do I go about creating segmentation masks for this images?
...
2
votes
1answer
68 views
How to clip raster inside of circle (python gdal)
I have a source raster and an ERSI shape file, want to crop the raster into the circle.
raster = gdal.Open("raster.tif", gdal.GA_ReadOnly) #read raster
projection=raster.GetProjectionRef()
...
3
votes
0answers
25 views
Google Earth Engine: Prevent Cloud mask algorithm for Landsat-8 from removing coastline lines
I'm a new Google Earth Engine user an I am trying to remove clouds on Landsat image using cloud mask. However, the cloud mask removes even the shoreline lines, not the clouds. I don't know why. Is ...
1
vote
1answer
50 views
QGIS: Clip Raster by Mask Layer-permanently remove black edges
I want to introduce geotiff images generated in QGIS by clipping ortho imagery to a shapefile into matlab. However, the clipped raster images come with black borders. I managed to remove them in QGIS (...
1
vote
0answers
29 views
Mask out areas inside a feature collection on Google Earth Engine
I am quite new to javascript and I am trying to apply a mask on an image to exclude areas inside a feature collection, I have seen that for the case of image collections the "mask" and "mask.not" ...
1
vote
1answer
79 views
Masking using two sliders on Google Earth Engine
I am trying to apply a mask based on two conditions (elevation and MNDWI), however, I don't find a way to integrate the two conditions using sliders, which would update the map when any of the sliders ...
1
vote
1answer
50 views
Perform Fragstats-like analyses around a defined radius of multiple points with overlapping buffers on raster file [closed]
I'm trying to do patch analyses (similar to those available on Fragstats) on NLCD landscape data (raster data). I have about 2000 points all over the state of NY.
My plan is to:
1) create a 100 ...
0
votes
1answer
77 views
R: mask a raster by a polygon also keep cells partially covered [duplicate]
I want to mask a raster by a polygon, the R script was as followed. However, some cells with only partially covered weren't included in the masked raster as listed in the picture link (https://drive....
0
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0answers
26 views
Removing clouds in Landsat 5 TM Collection 1 Tier 1 TOA Reflectance image
I am trying to remove the clouds from my image but when I try to run the masked layer seems to be error. Is there any solution how to remove the clouds or solve the issue.
The link is: https://code....
0
votes
1answer
44 views
Create mask for each layer of time-series raster in R
I'm trying to create a mask using each layer of my stacked Pixel Reliability QA rasters in R. I'm trying to exclude pixels with values greater than 1. I will use them to mask my vegetation index time-...
0
votes
1answer
17 views
Give non-overlapping parts of 2 rasters a value 0 (QGIS)
Is there a way in QGIS to give non-overlapping parts of 2 rasters a value of 0 in the new raster file?
I would like the data gaps in the velocity file (so where Ice mask is displayed on the chart) ...
0
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0answers
116 views
Clipping raster by feature using GDAL in QGIS?
I have successfully selected the feature from a shapefile (boundary) and intend to use this as a mask to clip the raster map underneath. However, having followed instructions when I open the GDAL > ...
1
vote
1answer
104 views
Overlapping multiple images with cloud masked?
I am now using fmask algorithm to eliminate the cloud covered areas on Landsat images.
I choose a period of time (Jan 1st 2017 to Dec 31st 2017), and selected the study area (Florida). I want to get ...
1
vote
1answer
163 views
Mask water bodies in GEE
I'm trying to to detect changes in land surface over few periods in a specific polygon.
The problem is that I want to block water bodies from my calculations.
How can I do it?
This is the code I ...
1
vote
1answer
95 views
Uploading polygons and masking pixels inside the polygons using Google Earth Engine?
I am working on a classification problem on agricultural fields. To make things easier, I first identified road, cities, water, fields, and etc. I am planning to eliminate road, cities, and water out ...
0
votes
1answer
21 views
How to mask an area in ArcMap and run supervised classification on unmasked area?
I would like to just run supervised classification on my area of interest (all along the coastlines) and would like to know how to do this in ArcMap. I have created a polygon to mask out the area out ...
1
vote
1answer
82 views
Google Earth Engine: Masking land out of Sentinel-3 imagery
I'm trying to isolate ocean cover from OLCI imagery using a bitmask from the quality_flags band. But it's masking all the pixels, and I notice when I mask the ocean and leave the land, the land is ...
1
vote
0answers
31 views
Is there a way to interpolate lost data/lost pixels caused by cloud and cloud shadow masks in Google Earth Engine? [duplicate]
I'm sure cloud and cloud shadows have been, time and time again, a frustrating problem. Usually after masking the two, I composite multiple images (in a set time interval e.g. 2015-2016, months 6-8) ...
2
votes
1answer
67 views
Reducing file size by not storing no-data points
I have to compute sea wave forecast for large period of time. Land information is of no use here.
Is there any file format that allows to not store no-data/fill values for land area to reduce file ...
1
vote
0answers
64 views
Filtering anomalous pixels from masked raster in Python?
I am struggling to succesfully filter out anomalous pixels from a Sentinel-1 image band mask (Pixel based), produced in Python.
I am new to Python.
By anomalies, in this situation, I mean ...
1
vote
1answer
98 views
Google Earth Engine Mask application
I'm using GEE in order to extract evapotranspiration (ET) data from MODIS (MOD16A2v6).
I want to extract only ET band in order to make some further process.
To do so, I apply some filters (like ...
1
vote
0answers
50 views
Why did not I manage to reproject layer?
I have a global land cover map, which has the following properties: Name ESACCI-LC-L4-LCCS-Map-300m-P5Y-2010-v1.6.1
Path C:\QGIS\ESACCI-LC-L4-LCCS-Map-300m-P5Y-2010-v1.6.1.tif\ESACCI-LC-L4-LCCS-...
0
votes
0answers
21 views
Why the Masking in ENVI does not give different statistical result
I want to run statistical band correlation of an image in ENVI. The image has been masked with polygon of interest, and shows no-data value outside the polygon. I expected that it calculated only the ...
3
votes
1answer
119 views
Creating water and vegetation mask via image collection?
I am a Java script and EE novice but I'm already a great fan of Google Earth Engine. I am simply trying to create a single NDVI and NDWI masked layer to work on. Below you'll find my Frankenstein of a ...
2
votes
1answer
555 views
Setting masked pixel value in Google Earth Engine image export?
I'm using Earth Engine to preprocess and download some NDVI data. I used a region of interest to clip the imagery to a geometry, and values from the Summary QA layer to mask out pixels that were of ...
2
votes
1answer
52 views
Replacing masked cloud areas with another satellite image?
I have various Landsat images of which many are cloudy. Using the cloud masking plugin available in QGIS, I was able to identify and remove the areas with cloud and cloud shadows from every image.
...
1
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0answers
75 views
Raster masking with vector error in QGIS 3.6
I have a global glc-2000 raster map. I would like to clip it to study specific area. I used boundries of continents shapefile as mask. Both of them have same projection. Since I am beginner I have ...
4
votes
2answers
223 views
Masking layers by a vector polygon layer in QGIS
I have a vector layer of buildings:
and a polygon layer coloured by some quantity:
and I want to mask one by the other to produce this:
This can be done by setting the blend mode to "Multiply" with ...
1
vote
1answer
24 views
Trouble with masking
I am trying to mask out a section of an image I created with an algorithm. I create a geometry of the section I want to mask out and clipped that with an image of 1's to create my mask image. But when ...
2
votes
1answer
27 views
Performing localized raster edits using ArcGIS Spatial Analyst?
I have a raster image of water depth, float point values 1-15, in a very small area some erroneous values are in the raster with values of 100 - 375. I'm looking for a repeatable work flow in ArcMap ...
1
vote
2answers
92 views
Visibility analysis with mask for non visible areas?
I have LiDAR data and I've made a Digital Surface Model (DSM):
I've made a visibility analysis for 3 buildings with this model:
My goal is to know from where the buildings are visible, not what do ...
0
votes
0answers
55 views
Missing raster data from masking with a spatial polygon layer in R
I am fairly new in R and I am trying to create a new raster by using a spatial polygon layer. I have the code written by using the mask function and the output is essentially what I want, but I'm ...
0
votes
0answers
60 views
How to mask a raster layer (interpolated surface) onto a polygon layer? [duplicate]
I have performed interpolation (IDW) for average monthly precipitation and temperature values for Europe. For my project, I'm focusing on the UK and Sweden so I'm wondering can I clip or mask the ...
2
votes
0answers
177 views
Sentinel 3 Cloud Masking in Google Earth Engine
I am new to GEE and I wanted to use this as part of my research.
My first step was to mask the clouds off the images.
The code i created basically mask out pixels based on the Quality Flag Bit 27, ...
0
votes
0answers
70 views
Function to remove borders and clouds from SENTINEL2
I've been trying to test SENTINEL, and found some functions to clean the clouds and edges of the images, but I do not understand exactly how this function works, and I'm very curious to understand ...
0
votes
0answers
124 views
How delete delete or mask nodata 0 value in the mask
I have raster (with 5 bands) and shapfile in the same projection.
I do this script for rastersize and do mask and clip raster or crop raster with mask but I need to have just clip raster without black ...
3
votes
0answers
209 views
Writing masked GeoTIFF in rasterio and visualizing in QGIS?
I have an interpolated raster, which is a masked array, that shows where the data is valid. I want to save it as masked TIFF with rasterio.
To test, here's the JSON file, and the code:
import ...
1
vote
2answers
781 views
Rasterio error: Input shapes do not overlap raster but reprojection not working
I'm trying to use rasterio (v1.0.13) and fiona to perform a raster clip on a geotiff using a geojson polygon. For reference, the clip works perfectly from the command line using GDAL:
gdalwarp -...
2
votes
1answer
60 views
How I get the masking area data and export data in Google Earth Engine?
Here is my code in GEE:
var CO = ee.ImageCollection('COPERNICUS/S5P/OFFL/L3_CO')
.filterDate('2018-07-04', '2018-07-05')
.select("CO_column_number_density");
var CO_merged = CO....
0
votes
1answer
172 views
Google Earth Engine: Problem with the updateMask function
I'm trying to use the updateMask function in GEE but I'm not quite sure how to use it in this occasion. So i did a trend analysis with formaTrend() to analyze the loss of forest cover in an area:
...
0
votes
1answer
88 views
Resample rasters after buffering in R
I have a raster stack that has NULL values from applying a focal buffer. They're not NA values but 0. Each layer shares the same extent, but the layers with the larger buffer widths have more 0 values ...
2
votes
2answers
294 views
Masking random pixels in an image
I have a feature collection that is used as input for a model. In order to validate the model, I would like to mask a random percentage of pixels from each image, i.e. splitting the feature collection ...
0
votes
1answer
248 views
Vectorizing large-scale binary layer in Google Earth Engine?
I would like to vectorize binary raster layers in Google Earth Engine in order to be able to use the geometry of the resulting FeatureCollection in other tasks (e.g. clipping data or similar things).
...
1
vote
1answer
456 views
Masking GeoTIFF file after GeoJSON through rasterio - “Input shapes do not overlap raster”
So my intention is quite simple:
I have a 4-Band TIFF file I want to crop after a polygon shape. However, I'm getting the following two exceptions
WindowError: windows do not intersect
ValueError: ...
0
votes
1answer
105 views
ENVI 5.1 - ANN Classification - Background was classified into one of the class
I'm new to Remote Sensing and I'm having trouble in ENVI 5.1 where the background was classified as one of the classes in the ROI I used, which is not right. How can I exclude the background or at ...
