Questions tagged [image]
A representation or description of a scene, typically produced by an optical or electronic device, such as a camera or a scanning radiometer.
96
questions with no upvoted or accepted answers
4
votes
0answers
40 views
Displaying images as part of multiattribute labels using QGIS
I would like to display images referenced in an attribute column as part of a multiattribute label, so that I can eventually print them with the map. I do not want to display geotagged images, since ...
4
votes
0answers
1k views
Convert land-based camera image pixel x,y to ground lat/long or x,y,z
I have a number of cameras at various known locations (x,y,z) and directions that are above ground about 20 feet pointed at different ground locations about 100 feet away from each camera, and whose ...
3
votes
0answers
146 views
Could not allocate required memory for image
I'm trying to export a 24k image (export set to 1650DPI) using the "export as image" function but I keep getting the "Could not allocate required memory for image" warning.
I don't understand why ...
3
votes
0answers
89 views
Processing drone Images of body of water?
I took some pictures of a body of a body of water using a multi-spectral sensor attached to drone. When trying to process the image using Pix4D, more than 50% of pictures were unable to calibrated.
...
3
votes
0answers
456 views
Import multiple images into attribute table
Does anyone know how to tie multiple images to attributes within a shapefile attribute table at once?
I am working with a point shapefile within a geodatabase that has a total of 2500 rows of data ...
3
votes
0answers
125 views
Image & limit user access by poly
Wondering how do I clip images to polygon outlines in a web map application based on OpenLayers or Leaflet? How can I limit web map users to see (visualize; qualitative) or query (quantitative) within ...
3
votes
0answers
627 views
Multiple image in OpenLayers
I'm trying to add multiple images to OpenLayers. I have the following (some code is excluded):
var images = [image1,image2,image3] // these are url images on my server
var image = new OpenLayers....
3
votes
0answers
421 views
How to read pixel values from an image server layer with ArcObjects?
I'm having a problem with reading pixel values from the image server layer. The image server layer class implements IRasterLayer, so when I tried to read pixel values using IRaster2 obtained through ...
2
votes
0answers
24 views
Wrong values after resizing (resampling) rasters using cv2.resize (Python)
I have two images (aerial photographs):
ImageA is 4740x4240 and cell size is 0.1 m
ImageB is 1849x1653 and cell size is 0.25 m.
I want ImageB with the same size than ImageA. I used the following ...
2
votes
0answers
33 views
QGIS automated export to image of multiple layersets
I have one project that contains layers in QGIS.
Every layer is a quarterly update of my fairway showing the fairwayprofile and aids-to-navigation of the whole of my administration area.
My current ...
2
votes
0answers
57 views
Charting Normalized Difference of Image Collection?
I would like to get the normalized difference of each image within an image collection (In this case Sentinel-2) for a specific polygon/geometry and then chart the values calculated for each image.
...
2
votes
0answers
200 views
Saving osgeo.gdal.Dataset as GeoTIFF or JPEG with world files using GDAL from Python?
I am trying to take a plain JPEG with no spatial references, apply ground control points (GCPs) to it, and output a georeferenced GeoTIFF or JPEG with world files.
I found some code that seemed like ...
2
votes
0answers
123 views
Georeferencing multiple images as GeoTIFF (same size and extents) in QGIS
I have 50 images and I want to georeference them all on to the exactly same place. They have all the exactly same size and extends. I've begun to load the same georeferencing points for every single ...
2
votes
0answers
51 views
Locating and copying millions of images in QGIS?
I have image data collected across the US and Canada from 2016 and 2017. I need to find all images that are within 5 meters of each other in order to compare changes in landscape over the year. Eg, ...
2
votes
0answers
143 views
Combine raster (monocromatic and RGB image)
I have to make an image starting from a cadastal map (monocromatical image) and an orthophoto (RGB image). Both are in tif format. The images are perfectly coincident, resampled to have the same pixel ...
2
votes
0answers
159 views
Adding non georeferenced image as BaseLayer
I am trying to add non georeferenced image as a Base layer in OpenLayers3 (v.3.8.2). On top of that there is WMS, called from GeoServer, as Overlay.
I successfully loaded both layers, but they are not ...
2
votes
0answers
224 views
Non-HTML circle text labels on Leaflet map
I need to save image of Leaflet map with polygon, multi-polygons, circles and text below every circle. I have geojson file with circle and polygon coordinates (lat and lng). I managed to get image of ...
2
votes
0answers
183 views
Landsat Data to Map Slums in India
I am working on a project to answer the following geographic question: How much have slum areas increased in Mumbai, India, since the 1970's (or earliest data).
I have downloaded LandSat imagery and ...
2
votes
0answers
439 views
How to batch classify a multi-temporal raster image stack?
I am using dense time stacks of remotely sensed imagery to analyse vegetation change in the Arctic from 1984-2010 for one scene. I will be needing to classify each image, likely using the Maximum ...
2
votes
0answers
135 views
Flood extent extraction from satellite images
How can I extract the floodwater from satellite images? Is the image classification method accurate for moderate-resolution satellite (Terra/Aqua MODIS)? Or are there more accurate methods?
2
votes
0answers
808 views
Processing MOD35 cloud mask image?
I have a question about processing MOD35 cloud mask image.
I worked reprojection on MOD35 cloud mask image using MODIS Swath Tool.
The processed results of MOD35 cloud mask are consist of 6 band ...
2
votes
0answers
2k views
Automated testing for GIS apps
There are several commercial and opensource tools for regression automation. While many of them could be employed to test GIS apps, they fall short, at times, dealing with the unique characteristics ...
1
vote
0answers
26 views
QGIS- Widget Photo Attachment do not show photo (small pix)
I have attached photos with their file path in the column. And I have set the height and width of the photo. but it does not work to show the photo on the attribute table.
and this is when I show ...
1
vote
0answers
8 views
Filter collection with millis data on MODIS
I'm trying to split a modis collection in two others, using like a splitter a data time that's defined in millis. I don't want to do it manually.
var maskMOD13Q1 = function(image) {
var qa = image....
1
vote
0answers
42 views
Exporting map error - QGis
Whenever I try to export a map as an PNG image I get the 'successfully export' message but there is no file generated. The error happened in Zanzibar so I changed to Noosa but I still can't export the ...
1
vote
0answers
23 views
Multiply two image collections with different sizes based on dates
I have two image collections. They are both filtered by date beginning on Jan 1, 2019, and ending on today's date. The size of the first (kc) is 35 images and the second (ETo) is 225. The first has an ...
1
vote
0answers
36 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
29 views
QGIS georeferencer distorting colours?
I try to use the georeferencer to geofreference certain building plans, but the referencer really distorts colours:
As you can see in the picture. it hollows out what used to be solid red, black and ...
1
vote
0answers
36 views
How to pixelwise annotation with QGIS
I need to create masks with QGIS of hedgerows for satellite images (raster) segmentation.
I tried with the SCP plugin but I can't use growing algorithm because I only want to keep hedgerows, not ...
1
vote
0answers
34 views
Interactive trigger for external image viewer?
Is it possible to navigate from point to point with a shortcut on the keyboard and interactively (tracking) display the embedded photos at the point locations in an external image viewer?
I could do ...
1
vote
0answers
42 views
QGIS Web View doesn't show up picture correctly
As a part of my graduation project, im working in data system that can show up features about a railway inspection.
One of the features are images that show up failures. These images are from URL ...
1
vote
0answers
201 views
Reducing image collection separately for each image to make series?
I know how to reduce a collection to one image, or an image to a value in Google Earth Engine. But I can not find an easy way to reduce each image in a collection to a statistics and get a list of ...
1
vote
0answers
373 views
Select border region from segmented image
I have several thousand aerial photographs which have been scanned in and orthorectified, but the image borders and fiducial markers remain on the image. I am looking to identify these parts of the ...
1
vote
0answers
20 views
View Images in Carto
For 120 datasets, which I already loaded into carto and are shown where they are supposed to be shown, I want images to be viewed as well.
In my thinking it should have been enough to put in an URL ...
1
vote
0answers
53 views
Couldn't load images on html on plugin processing (Linux and Windows)
Context
I develop a processing plugin for QGSI 2.18 and in design GUI with *.ui files (Qt4)
I can’t load PNG images with relative path in html defined in .ui files
Works with absolute path
It ...
1
vote
0answers
59 views
Identifying clusters in classified imagery data
I am relatively new to working with satellite imagery at 1 m resolution and am struggling with a methodology for "grouping" the imagery.
Using ArcGIS, I have performed an ISO classification on some ...
1
vote
0answers
270 views
Different image quality for different zoom levels (OpenLayers/GeoServer)?
Original data that raster layers are made of are of a high quality. At a small scale (1:100) this is useful. However at a large scale (1:10 000) it results in ~300KB PNG images which are actually not ...
1
vote
0answers
82 views
Automated way to create polygons from coloured map
I have a scanned map that has areas of different colours. I want to create polygons for each area and would like to avoid doing it manually (tracing over the shapes).
Is there a way to do this? I ...
1
vote
0answers
78 views
Launching hyperlinks using non default Windows Viewer in ESRI Web Applications
We have developed a custom Python based image viewer, which we would like to deploy in Portal for ArcGIS for viewing hyperlinked images (through attribute tables). We can't use the native Windows ...
1
vote
0answers
331 views
Generating shapefile polygons from png
I'm trying to generate shapefiles from png image and isolate polygons by colors. I'm using gdal_translate to georeferencing image to GTiff and gdal_translate.py to convert GTiff to shapefile. ...
1
vote
0answers
310 views
Including image in callout using ArcMap?
I'm using ArcMap 10.3 and creating a map of 30 properties where each property needs to include an image within the callout.
The final product has to be a printed map. I'm familiar with creating ...
1
vote
0answers
43 views
Cropping Oblique Photos to Geographic Feature
Let me preface this by stating that I know I'm in the GIS neighborhood and I'm asking a code heavy question, but my hiccup here isn't the programming - it's the GIS and associated math.
I am writing ...
1
vote
0answers
701 views
How to reshape an array of points into an image
I have a numpy array of shape (1964, 3), in the following format:
[
[ 0.3945, 52.700, 0.8 ],
[ 0.3788, 52.121, 0.3 ]
]
etc.
Each nested array represents a point in the format of [longitude, ...
1
vote
0answers
9k views
Zero-size array to reduction operation maximum which has no identity
Below is my identify background code, which identifies a background from an image and removes it.;
Previously it's was working fine but after I chunked my images and try to find out background I got ...
1
vote
0answers
510 views
How to host kmz file for Google Earth Pro network link
I have a repository consisting of a large number of image overlays, polygons, and 3d polygons in Google Earth Pro. The image overlays are linked to and stored on a windows web server and it works fine ...
1
vote
0answers
265 views
4 Band JPEG2000 compression for RGBNIR
The South African National Mapping Agency acquires multispectral imagery (R,G,B and NIR)and currently compresses its aerial imagery with JPEG compression with a TIF wrapper. So we give out JPEG (Q3) ...
1
vote
0answers
130 views
QGis through python script : no map exported (map will be printed here)
I am very new to GIS in general and even more to QGis. I have a pretty simple task which is to import all shapefiles in one folder, style them and finally export them.
I have wrote python code that ...
1
vote
0answers
451 views
How do I make a ratio image on Erdas Imagine 2014?
I have a stacked image but want to divide bands 4/5/. I have built a model on the model maker but the resulting image is completely black after running the model. When I open the attributes table the ...
1
vote
0answers
636 views
OpenLayers add white background to image/png geoserver layer
i created a new wms layer in openlayers. i get the layer from geoserver as image/png and transparent=true.
openlayers rotate the raster 30 deg (due to its coordinates - it's fine!) but add white ...
1
vote
0answers
137 views
Using same ROI/Signature for classifying spatially different rasters?
Using QGIS SCP Plugin, I have classified a raster of a state.
Can I use the same ROI/signatures to classify rasters of other states?
