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Medium Resolution

PlanetScope Monitoring provides a medium-resolution, continuous, and complete view of the world from above.

95 Topics
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95 Topics

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lucialayr‎‎ 🌱

asked in Medium Resolution

Comparing NDVI across PlanetScope images

Hi everyone, I recently worked with Planet data for the first time. I downloaded two PlanetScope images from the Planetary Explorer (RGB-IR reflectance and I also chose the option to harmonize images with Sentinel-2)I then calculated NDVI for both images and then the average. I am very surprised by the averages I find. In the center of the image a fire happened in between the two dates so I would expect NDVI to decrease (makes sense). However, I am suspicions of the increases in NDVI I see in other areas, that seem to be the same order of magnitude. While this could be an artifact of NDVI just being quite low in general, I was still wondering if there is an issue with comparing data across difference images taken by different satellites?Here is the code I used to process the data (in R):library(tidyverse)library(sf)library(terra)library(tidyterra)NDVI = function(raster) { ndvi_r = (raster[[4]] - raster[[3]]) / (raster[[4]] + raster[[3]]) return(ndvi_r)}raster_prefire = terra::rast('202

200

4 days ago

mariah.hauckPlaneteer 🌎

posted in Medium Resolution

Resources and Q&A - Agile EO Webinar: Analysis-Ready PlanetScope Reaches General Availability

In November’s Agile EO episode, we introduced Analysis-Ready PlanetScope (ARPS)—a new offering that accelerates your analytical workflows with pre-processed, harmonized satellite imagery. Watch the webinar on-demand. Below are some questions we received during the event and resources to learn more. Questions Question: Is there a technical product sheet for today's products?Answer: The Analysis-Ready PlanetScope Technical Specification is available here. Question: How do you reduce the clouds or select the images with minimal clouds?Answer: Analysis-Ready PlanetScope does not remove clouds. It composites the best available PlanetScope pixel taken over an AOI based on the amount of cloud cover and quality. The cloud mask is produced by creating a cloud-free reference image using a year’s archive of PlanetScope, Sentinel-2, and Landsat. Question: Can Analysis-Ready PlanetScope data be accessed in Planet Explorer?Answer: No, currently, there is no support for viewing Analysis-Ready Plane

3824

14 days ago

belen‎‎ 🌱

asked in Medium Resolution

Same footprint?

Hello, I wanted to know if Planetscope images have the same footprint. For a defined AOI, is the pixel position maintained for images from different dates?

991

1 month ago

Meridia‎‎ 🌱

asked in Medium Resolution

GEE app failed to load planet-nicfi basemap

Hi community,We are facing the same challenges as reported here: We see that the solution 9 months ago was solved with support team. Wondering if specific tickets are still needed as we are facing exactly the same challenge.Best,Vivian Ribeiro (Meridia's team)

881

1 month ago

Richard‎‎ 🌱

posted in Medium Resolution

Help for my cute cat!

Dear Planet Company,Hello, I am a fan from China. Recently, a cycling blogger I follow went through a very terrible setback. During his cycling journey, his beloved cat was poisoned and discarded. Since the area was extremely desolate and there were no available surveillance footage, I was wondering if Planet Company could check satellite images or real-time footage within a 5km radius of the following coordinates for the time frame below?Coordinates: 39°11'54" N, 88°55'36" ETime: April 15, 2025, from 16:00 to 19:00 (GMT+8)Thank you for your consideration.

972

1 month ago

AAPV‎‎ 🌱

asked in Medium Resolution

Slight spatial misalignment in PlanetScope/RapidEye imagery

Hello!I have a set of scenes of the same area, but there’s some slight misalignment between them (like 3 or 4 pixels), this usually isnt a problem, but I need the most precission possible for my use case (measuring coastal recession), so even a small misalaignment could change results greatly. This happens between images from different and same sensors, so it isnt a result of using different sensors (at least i dont think so),beacuse i have some that are correctly aligned. Also, i used the same AIO to download the images from PlanetScope, so the images have the same extent and are clipped to the same area. My question is, is there any way to download scenes that are correctly aligned, or should I fix it manually? (or is there a faster way to automatically align them?) Thanks everyone!

1362

2 months ago

japolo‎‎ 🌱

asked in Medium Resolution

Rendering PlanetScope scene in QGIS appears incorrect

I downloaded 8-band analytics ready surface reflectance PlanetScope scenes for a study. I want to create a visualization of one of the scenes with QGIS. However, when I load the scene in QGIS as a raster, it doesn’t look like the agricultural field I’m expecting. I made sure to assign the bands as red = 6, blue = 2, and green = 4.This is how the scene looks in Planet Explorerscreenshot of planet explorer showing a selected image in an AOIThis is how the PlanetScope scene looks rendered in QGISQGIS with the PlanetScope scene in the drawing area The scene looks like an odd mosaic of colors. I realize that the resolution of the underlying NAIP image might influence how the scene might be perceived, but honestly, the scene looks like an odd mosaic of colors. How can I get the scene to render in QGIS the way it looks in Explorer?

991

2 months ago

harper269‎‎ 🌱

asked in Medium Resolution

Best Practices for Visualizing Clear Pixels from UDM2 in ArcGIS Pro?

Hi all,I’m working with PlanetScope SuperDove UDM2.1 data in ArcGIS Pro and I’m trying to better understand how to interpret and visualize clear pixels in the UDM RGB composite.As I understand it, the default RGB band mapping is: Red = Clear Green = Snow Blue = Shadow To work around this, we’re also testing the individual UDM bands using Extract Bands and the Raster Calculator, creating binary layers like:Con("UDM2_B1" == 1, 1, 0) (assuming Band 1 = Clear), so that: 1 = clear pixel 0 = not clear This is giving us a more direct view of which pixels are flagged as usable. Are we on the right track with that approach?I'd love to hear how others: Visualize or validate clear pixels in RGB composites Work with UDM2 bands in ArcGIS Pro or QGIS Apply symbology or classification to quickly identify good pixels for analysis We’re using this for water quality and algal bloom detection, so identifying usable pixels accurately is important for our downstream work.Any advice, workflows, or

1341

2 months ago

Haiyan Huang‎‎ 🌱

asked in Medium Resolution

black lines in SR file

Hi,I found some black lines (low values ) in the NIR band of 20200224_152346_83_106b_3B_AnalyticMS_SR. Those lines do not appear in RGB bands, so I think they are not natural features.I m not sure how many files have the similar issue. Would you please check as NIR band is very important to our research. best,Haiyan

4392

2 months ago

Javier Muro‎‎ 🌱

asked in Medium Resolution

Spatial shift in udm

Hi. I’ve noticed that in some images (3/3 so far), the udm layer has some shifts across scenes for one same tile/overpass. This complicates the application of cloud masks. Is is something you are aware of? or is it rare and I was just unlucky? 5626519_3264221_2022-05-09_241c_udm25625958_3263610_2022-05-08_241c_udm25626519_3264220_2022-05-09_241c_udm2

3292

2 months ago

Léo Rasse‎‎ 🌱

asked in Medium Resolution

Non consistent surface reflectance values

Hello everyone, I am using PlanetScope Scene images already corrected in surface reflectance (Dove Classic) to assess the temporal changes of the vegetation cover on a specific site. As the site is about 30 km long, I need to use several tiles to cover the whole area. I have recently noticed that the reflectance values of the pixels of two overlapping images are quite different (even if the images were taken by the same satelitte, at the same time).Do somebody know why do I oberve this ? If yes, do somebody know how can I solve and obtain consistant surface reflectance values between overlapping tiles ? I thank you in advance for your answers, Léo

4207

2 months ago

Evangelia Efi Konstantinidou‎‎ 🌱

asked in Medium Resolution

Issue with PlanetScope product type 'Harmonized'

Hi, I’m having issues with the ‘harmonized’ PlanetScope data products.I have been downloading several such scenes and after saving the extracted data folders on disk, the products seem not be the harmonized versions of the scenes. I posted a related question in the forum some months ago but I realize that, from my part I correctly choose the data product to be ‘harmonized’ (please see attachment temp_screenshot.jpg) while ordering. Nowhere in the downloaded files (.tif extension, manifest json file) is there an indication of the product being harmonized, it looks like an ordinary surface reflectance composite scene.For reasons I don’t understand, on the only 2 instances where I received properly annotated ‘harmonized’ products, the extracted folder had a different structure (attachment temp_screenshot_2.jpg). Usually each downloaded product gets extracted in a single folder that contains the ‘manifest’ and ‘catalog’ files.I would really appreciate some assistance/ clarifications here.

1763

2 months ago

herolobster‎‎ 🌱

asked in Medium Resolution

how to purchase imagery with low revisit rate but wide range (probably global)

I am working on a geopolitical science project on a weekly basis, how to get the PlanetScope global image within 30 days but with a low revisit rate? I've noticed the MONITORING PLAN, but a high revisit rate doesn't fit my needs. Thank you!

3484

2 months ago

Haiyan Huang‎‎ 🌱

asked in Medium Resolution

8b SR images have black strips

Hi,I’ve downloaded some 8b sr images, but I found they have some black strips across the image. (see below, band 4 of 20230214_080952_42_2447_3B_AnalyticMS_SR_8bmore obviously in shortwave bands. would you please check?Best,Haiyan

3662

2 months ago

zekariab‎‎ 🌱

asked in Medium Resolution

Failed to load planet-nicifi basemaps on GEE

I am getting the following error, when I try to load the basemap asset on GEE.ImageCollection.load: ImageCollection asset 'projects/planet-nicfi/assets/basemaps/africa' not found (does not exist or caller does not have access).

1691

2 months ago

mariah.hauckPlaneteer 🌎

posted in Medium Resolution

Resources and Q&A - Agile EO: Aircraft Detection at Planetary Scale

In March’s Agile EO episode, we introduced Aircraft Detection—a new offering that provides near-daily monitoring of thousands of airfields globally, enabling trends and anomalies to be spotted. Watch the webinar on-demand. Below are common questions, and questions that we weren’t able to get to during the live event. Our hosts Justin Davis, Sr. Product Manager - Applied Machine Learning, and Adam Van Etten, Principal Data Scientist, have provided answers, plus resources to learn more. QuestionsQuestion: Can you track aircraft in flight? Answer: We can’t say for sure that a given aircraft is the same aircraft from one day to the next, BUT we can track how many aircraft are present at a given airfield each day AND whether the aircraft present are in the same positions as they were before. This can help indicate activity at a given airport/airfield and highlight anomalous behavior. Question: How big of an airplane can you detect?Answer: In our experimentation, we found performance for ai

1130

2 months ago

S.shagun‎‎ 🌱

asked in Medium Resolution

Scaling and indices for bands for planet images

Hi,I am very new to remote sensing. I got raw images from planet scope for my area of interest through QGIS plugi. however before I calculate NDVI for my area. I need to normalised or scale the bands. I am using this formula lower_percentile = 30upper_percentile = 70y1=float(0.2)y2=float(0.5)def scale(band): # scale values for display purposes band = band.astype('float64') x1 = np.log10(float(np.percentile(band[band!=0], lower_percentile))) x2 = np.log10(float(np.percentile(band[band!=0], upper_percentile))) band[band==0]=np.nan band = np.log10(band) def equations(p): a, b = p return (np.log(a)-x1*b-np.log((1-y1)/y1), np.log(a)-x2*b-np.log((1-y2)/y2)) a,b = fsolve(equations, (1, 1)) band=1/(1+a*np.exp(-b*band)) return band. Can somebody please tell why could be different method for scaling and is there any paper which can recommend for scaling the planet images?

3145

3 months ago

jan.blazek‎‎ 🌱

asked in Medium Resolution

Issue with Retrieving NDVI Data from PlanetScope

Hi,We have started testing PlanetScope, but we are unable to retrieve NDVI data for the selected area.In My Collections, we created a Collection with ID, and we added a Subscription to it. The PlanetScope data was successfully loaded—we can see and download it via the web application.However, when we try to generate NDVI using the API endpoint https://services.sentinel-hub.com/api/v1/process, we do not receive any data. The endpoint returns null.Request:{ "input":{ "bounds":{ "properties":{ "crs":"https://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "bbox":[ 13.895467093481912, 49.978376989130496, 13.905815440973406, 49.982298215337835 ] }, "data":[ { "type":"byoc-<collectionId>", "dataFilter":{ "timeRange":{ "from":"2025-03-09T00:00:00+01:00", "to":"2025-03-09T23:59:59+01:00" }

1761

3 months ago

kristofj‎‎ 🌱

posted in Medium Resolution

Preparing Imagery for Time-Series Analysis

I am attempting to prepare PlanetScope imagery for a time-series analysis. I have read a bit about transforming imagery into Analysis-Ready Data (ARD), so I am aware of the general steps in the process. This is the high-level workflow I have come up with so far:masking --> normalization --> compositing --> co-registration However, I am not sure how to implement these steps. Does anyone have any resources that describe how to prepare imagery for time-series analysis in as much detail as possible? Some other details:I am using 8-band imagery from SuperDove sensors I have downloaded imagery as analytic surface reflectance at this point (but am open to other formats) I am using Python to acquire and process this imagery.Thanks for any help you can provide.

2204

3 months ago

minhnguyen‎‎ 🌱

asked in Medium Resolution

Unexpected response status: 422 in timelapse

I want to create a timelapse using PS imagery but I have this error Unexpected response status: 422. Why is the error? I use more than 100 images.

2542

3 months ago

Dinh Hung‎‎ 🌱

asked in Medium Resolution

Xin gia hạn tài khoản

Xin chào,Hiện tại tôi đang sử dụng hình ảnh PlanetScope để phân tích dữ liệu thông tin biến động rừng của mình. Tuy nhiên, tôi nhận thấy Tài khoản Giáo dục và Nghiên cứu của mình đã hết hạn. Tôi có thể yêu cầu gia hạn cho tài khoản của mình không? Ngoài ra, hiện tại tôi cần lượng dữ liệu lớn hơn. Tôi có thể tăng giới hạn tải xuống hàng tháng cho tài khoản của mình không?Cảm ơn bạn rất nhiều vì sự giúp đỡ của bạn. Tôi mong nhận được phản hồi của bạn.

2572

3 months ago

Varaha_RS‎‎ 🌱

asked in Medium Resolution

RGB reflectance ranges for proper RGB layer display on QGIS

I am having trouble in getting a clear display of a true color composite (TCI) of a harvested farm in north of India in QGIS. I am using Planetscope image of 2024 from the 8-band Superdove collection. This is a 2.5 acre farm. The TCI content is getting obscured by rainbow effect (‘Unclear.png’). The band ranges and other symbology details are given in ‘Unclear_specs.png’). I have attached a screenshot of the metadata of this farm for reference (‘Unclear_metadata.png’). What band value ranges or other parameters should I edit to see a clearer image?FYR, I have attached screenshots in the three categories for a larger farm (14 acres) that is harvested in one plot and tilled in other plots: Clear_14ac.png, Clear_14ac_specs.png, Clear_14ac_metadata.png. This farm has a very clear view. The clear confidence percent for this image is 95 as compared to the unclear farm (85) but that should not produce such a drastic difference in clarity given the clear percent in both images is 100.Please he

3342

3 months ago

mariah.hauckPlaneteer 🌎

posted in Medium Resolution

Recording Available - Agile EO: Planet Monitoring Overview and Q&A Webinar

In January, as part of our monthly Agile EO webinar series, we asked the live webinar audience what product they’d like us to explore more. So in February, we hosted a dedicated Q&A session on our flagship product, Planet Monitoring. If you missed the Planet Monitoring Overview and Q&A webinar or want to watch it again, you can access the recording now. We also have some additional resources you might find helpful after watching: Dive deeper with our product resources: Planet Monitoring datasheet, Planet Basemaps datasheet, and the Analysis-Ready PlanetScope technical specification. Watch past episodes of the Agile EO webinar series. Contact sales to get started.I hope you’ll join us on March 26 for Agile EO: Aircraft Detection at Planetary Scale where our product experts will introduce this new product with an overview, demo, and Q&A session.

1010

3 months ago

kgis‎‎ 🌱

asked in Medium Resolution

Steps to take to extend my account further

I wanted to reach out regarding my account, which is currently set to remain active until September 30, 2024. Could you please let me know the steps I need to take to extend my account further?I appreciate your assistance and look forward to your guidance.

2542

4 months ago

Ovidiu‎‎ 🌱

asked in Medium Resolution

Confused about image resolution

Greetings all,By my own admission, I am very new at the satellite imagery usage and processing, so I am confused about the image quality (resolution) that I am seeing in the images downloaded.I am downloading a series of images that have a GSD of 3.7m, so this should allow me to resolve an object of about 9m.When I open the images in ArcGIS Pro, the images are really pixelated, and I cannot even clearly see the outline of houses.Here are some item IDs that I have downloaded today 20230921_151412_22_242d, 20230820_155500_02_247d, 20230705_150612_29_2420, 20230530_151402_74_24cc, 20230403_150804_41_2431, 20230723_150707_37_2460And here is a sample of the images I see on my screen, viewed at a resolution of 1:3,672. Heck, I get better resolution from Google Maps imagery (but not the 8 band spectra) like the Planet images have. Do you know what I am doing wrong?

4216

4 months ago

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