Questions tagged [masking]

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271 views

Stacking and masking Landsat at the same time with rasterio

Based on answers from previous questions 1,2 and the Masking a raster using a shapefile guide from rasterio cookbook, I wrote the code below. The code runs correctly. I would like to improve it. 1- ...
4
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0answers
2k views

Using polygons to create mask on 2d grid with Python?

I have some polygons (Canadian provinces), read in with GeoPandas, and want to use these to create a mask to apply to gridded data on a 2-d latitude-longitude grid (read from a netcdf file using iris)....
3
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0answers
59 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 ...
3
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0answers
262 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 ...
3
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0answers
1k views

Make a grid map in Leaflet

I want to draw a grid map based on the temperature values in Leaflet. Similar to the illustration below. Input data: lat, lon, temperature values, cities' names Parameters: the dimensions of the ...
3
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0answers
151 views

Open source alternative to the “Contours with Barriers” Tool in ArcGIS

I am trying to create a contour file for the globe for a project and am using open source GIS software packages. I was trained for several years on ArcGIS and there is a tool to create contours with ...
2
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1answer
188 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 ...
2
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0answers
215 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, ...
2
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1answer
123 views

Get pixel values from a raster using a multipartpolygon

I'm trying to get the mean value of pixels from an NDVI raster, that intersect the geometry of a FeatureCollection, that is a multipart polygon which represents my sample area, but I can't find the ...
2
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0answers
46 views

ArcMap 10.5 Desktop: Highway shield test symbols not respecting mask layer about it

How do I stop highway symbol markers from appearing above my mask layer? The actual highway layer is below the mask layer in the drawing order (so the actual highway line appears below the mask layer,...
2
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0answers
184 views

Expanding raster within mask by interpolating it with boundaries set to 0

I'm having a hard time trying to expand a raster within a mask. Here are some details about my case: I'm working with glacier ice thickness rasters, which happen to be smaller than the real size of ...
2
votes
1answer
37 views

How to include pixels excluded by MASK in GRASS GIS?

I have a 150km x 150km raster layer of elevation. I'm running a cell-by-cell PyGRASS script, with one step that considers all neighboring cells within a fairly large circular radius (25km). To account ...
2
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0answers
406 views

Geoserver Dynamic Raster Masking Based on Request Parameter

Is it possible for Geoserver to dynamically mask out values above or below a certain threshold in a WMS or WCS Geo-tiff request? For instance I make a request with some threshold parameter like 49 ...
2
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0answers
90 views

Rasterizing Shapefile, using other shapefile as Mask

I have a shapefile (ShapeY) of European extend and want to rasterize each time only a certain area of the shape (ShapeX) (i have the shapes indicating the prevailing extend) with python and QGis. ...
2
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0answers
144 views

How to mask only select layers (i.e., exclude some layers from the mask)

is there a way to create a masking layer in QGIS (2.14) that will mask only certain layers, so that some layers (such as baselayer imagery or other) will be unaffected? I'm using geometry generator ...
2
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0answers
826 views

Efficient way to resample, crop, and mask a raster image using R

Does anyone know an efficient way to resample an image? I am currently trying to crop a large image and clip two regions from a shapefile. From this clipped image, I would like to increase the pixel ...
2
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0answers
300 views

Creating polygons using mask layer?

I looked at this question, but it only answers part of my problem. I want to create Thiessen polygons based off of the green points within the blue polygon boundary ONLY. I've set the Processing ...
2
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0answers
405 views

Ecoregions shapefiles: subsetting, extracting and summarizing data from raster

I am attempting to subset and project an ecoregions shapefile from : EPA ECOREGIONS my data set is found here: SHAPEFILES and RASTER When I run this code, two major problems occur: 1) I cannot get the ...
2
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0answers
274 views

how to make decent sense from scattered river depth measurements

I sampled river depth at scattered positions and I want to be able to make a map and GIS layers out of it. My problems are: As the river meanders the interpolation I do in scientific packages i,e. ...
1
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0answers
30 views

Calculating water occurrence of Sentinel-1 images in Google Earth Engine

I would like to derive the occurrence of surface water bodies from Sentinel-1 image collection in the Google Earth Engine.In my example I could already compute the water mask using Otsu’s method for ...
1
vote
1answer
36 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 ...
1
vote
1answer
140 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
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0answers
47 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
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0answers
100 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
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0answers
55 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-...
1
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0answers
81 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 ...
1
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0answers
89 views

Summarising all the (NDVI) values pixelwise for a masked polygon

A .tif image has been created using the NDVI formula in QGIS. The resulting image shows a region, with varying grades of NDVI values over the image. A .shp file has then been created for an area of ...
1
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0answers
96 views

Does anyone know why I'm getting a completely black geotiff as a result of this shapefile cut out of another geotiff in rasterio?

I am using rasterio to cut out the shape of a lake outlined in my shapefile from a geotiff. When using a shapefile of a singular lake with a geotiff, this works perfectly, but not when cutting out a ...
1
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0answers
52 views

Applying a mask when running MESMA using VIPER tools plugin for ENVI

I am running MESMA on a landsat image that has large areas masked out, but I keep having all the background (value = 0 in all bands) pixels included in the analysis. They all end up unmodeled (no ...
1
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0answers
542 views

Apply mask and compute statistics with GDAL

I've constructed a VRT that includes a band of data and a mask (0/1 representing water/land) with: ds = gdal.Translate(masked_vrt, combined_vrt, bandList=[1], maskBand=2, format='VRT') Where ...
1
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0answers
94 views

Applying mask to Kriging shape in ArcGIS Desktop?

I'm trying to apply an mask to a Kriging image for after apply a Density Sampling Network, but unfortunately I'm not getting good results. I tried to apply on mask on Density Sampling Network and is ...
1
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0answers
43 views

ZonalStatistics crashing in python randomly?

I am running Arc 10.5 on Windows 10 and am having issues with the Spatial Analyst tool ZonalStatisticsAsTable that appears to crash my python script for no reason. I have used this script before and ...
1
vote
0answers
106 views

Applying mask to 40 Landsat images on ENVI?

I'm new to ENVI and am working on a time series for a section of the Santa Barbara Channel. I have a mask I made from the ROI tool, but was wondering if there is an efficient way to mask all 40 of ...
1
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0answers
64 views

How to use raster extract/clip raster in Qgis?

In arcgis, raster like a shp file, could extract another raster.But in Qgis,Raster->Extraction-clip, the mask file must be shp file. My mask raster are compound of many adjacent cells. If converted ...
1
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0answers
251 views

Interpolating (kriging) in ArcMap?

I would like to interpolate with kriging data points from one shapefile that should fill out the Space of another shapefile i am using as a boundary. I have set this boundary under Geoprocessing --> ...
1
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0answers
127 views

Use WMTS as a mask to clip a polygon in QGIS

I have loaded a WMTS layer. But when I carry out some raster geo-algorithms nothing shows up in the drop down table (i.e. I can't use the raster layer as an input object). How do I make it possible ...
1
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0answers
129 views

Grass i.landsat.acca says image is cloud free but it is not

I'm working on an area in Amazonia with high cloud persistance which makes global data on land cover quite useless at small scales, so I wanted to learn to process my own Landsat images, with GRASS ...
1
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0answers
202 views

Masking in ArcMap

I have question on masking. I have vegetation group layer. Under vegetation group layer, there are 3 layer which are V_Vegetation_Miscellaneous_A, V_Vegetation_Agriculture_A, V_Vegetation_Forest_A. ...
1
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0answers
320 views

Mask plugin, Atlas composer and Legend

I'm tryin' to use the mask plugin associated with atlas composer (QGIS 2.7 dev). I'd like to have in the legend of map composer only the features that belong to mask instance (inside the mask). if I ...
1
vote
0answers
2k views

How to generate TTA mask for accuracy assement in eCognition?

I'm learning to use eCognition software recently. I have done the image segmentation for Worldview-2 image. Then, I have processed for classification for class names (e.g forest,built-up area, grass ...
0
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0answers
32 views

Low-pass filtering raster with a mask - matrix

I have to do low-pass filtering with a mask - matrix: 1 2 1 2 4 2 1 2 1 This is my code import arcpy import numpy as np arcpy.env.workspace = r"C:\Users\ASUS\Documents\ArcGIS\Default.gdb" raster = ...
0
votes
1answer
39 views

Aligning pixels for using GSW as mask layer with Landsat 8 and Global Surface Water (JRC) Layer

I want to isolate some surface water areas on Landsat 8 images by using the Global Surface Water dataset in GEE as mask. After mapping both in the Editor I realized the positions of pixels of GSW and ...
0
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0answers
38 views

Exporting image of modeled data in Google Earth Engine results in too much mask

I am using harmonic regression in Google Earth Engine to model NDVI values for 2011. I would like to export the modeled values for every semi-monthly time-step (twice a month). However, if there was ...
0
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0answers
17 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
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0answers
21 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 ...
0
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0answers
38 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
25 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
189 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 > ...
0
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0answers
26 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 ...
0
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0answers
71 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 ...