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PlanetScope

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

  • 57 Topics
  • 166 Replies
57 Topics
E
ElishaNjomaba‎‎ 🌱
asked in PlanetScope
Cloud and Shadow Masking with UDM

Dear Community,I would like to find out how to deal with cloud masking using the UDM2 data from the PlanetScope.I already acquired an image that is cloud-free (from metadata cloud is 0.16). Do I need to do any cloud processing or masking? since this cloud percentage is basically insignificant.Again, I used a shape-file to acquire the image of my location since I want the image to span a period of data range; how do I go about the image mosaicing process?Thank you for the help 

2
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8 months ago
T
Thomas Howard‎‎ 🌱
posted in PlanetScope
Atmospheric Correction

Hi everyone, I am trying to decide whether I should perform my own atmospheric corrections to develop SuperDove surface reflectance products (especially over waterbodies).What best practices do you have for atmospheric correction over terrestrial and aquatic environments? Are there any workflows/code repositories that you have found helpful? As MODIS is decommissioned, what options exist to replace the water vapor and ozone inputs currently used in the process for generating surface reflectance products? What level of success have people had using these other inputs?  

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1 year ago
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Swapna Mahanand‎‎ 🌱
asked in PlanetScope
Understanding band composition in Planet scope data.

HiI have downloaded the data for my study sites. It comprises 6 scenes.For one month i downloaded the composite image but it seems like the different scene has different stretching effect.So i downloaded the individual scenes separately to mosaic.I tried to mosaic each band of the scene using ArcGIS, mosaic to new raster tool.But i am mosaicking a single band but the output is becoming an RGB image.Can anyone help me out of this confusion. I have attached the image of mosaicking of band-4 from each scene but the output is an RGB image. This is for your kind reference.   

2
S
1 year ago
J
jawad.ziyad‎‎ 🌱
asked in PlanetScope
PlanetScope Surface reflectance

Hello,I have a PlanetScope Surface reflectance Product. Is the AnalyticMS_SR.tif file is scaled surface reflectance in Digital Number ? and How do I convert the DN to surface reflectance value?

7
A
1 year ago
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tmyeoman
posted in PlanetScope
Co-registration of PlanetScope Imagery

Hello folks.  I’m wondering what approach everyone is using to co-register PlanetScope images for time-series analysis over large areas (beyond a single scene)?  My delivery was to Google Earth Engine.

9
J
1 year ago
M
Michael Ogungbuyi‎‎ 🌱
asked in PlanetScope
Planetscope harmonized bands with Sentinel-2

Hi Community, I used to think the Red-edge band alongside Red, Green, Blue and Near-Infrared bands of Planet are harmonized with Sentinel-2. However, the FAQ available through New-Generation PlanetScope FAQs suggests that Red-edge is excluded. Please could someone provide some information about this?Since the harmonized band is only from, I think January of 2022. I aim to use Sentinel-2 bands (red, blue, green and NIR) as a proxy for PlanetScope bands to enable me to go back to 2018 through 2022, and then interpolate the actual PlanetScope bands from 2022 to date for a time series analysis. My second query is to ask if an existing published article exists on this.Thank you Best regards  Michael

5
elyhienrich
Community Manager 🌎
1 year ago
H
Haiyan Huang‎‎ 🌱
asked in PlanetScope
the difference between _3B_AnalyticMS_SR_8b.tif and _3B_AnalyticMS_SR.tif

Hi, I am trying to use the surface reflectance product of psb.SD instruments.I found there are two versions of the SR products: 8 bands: _3B_AnalyticMS_SR_8b.tif 4 bands:_3B_AnalyticMS_SR.tif I assume the RGB and Nir  bands from the two files are the same (assume they are exactly the same in SR values). 8-band product has 4 more extra bands. best,Haiyan  

1
elyhienrich
Community Manager 🌎
1 year ago
H
Haiyan Huang‎‎ 🌱
asked in PlanetScope
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

1
idilgumus
Community Manager 🌎
1 year ago
H
Haiyan Huang‎‎ 🌱
asked in PlanetScope
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 

1
idilgumus
Community Manager 🌎
1 year ago
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Gabrielle Ruso‎‎ 🌱
asked in PlanetScope
Beginner Help: Converting to Surface Temperature

Hi all, I am a PhD student hoping to use Planet data in one of my projects.  While I have used ArcGIS in the past, I have not worked with satellite-based data before, so a lot of the terminology and data are new to me.  Given that, please forgive me for what is likely a very basic set of questions. I am interested in determining the surface temperature of various lakes over time.  Currently, it is my understanding that I should be able to download surface reflectance images and then convert these to surface temperature.  I have found a tutorial on how to do that with Landsat imagery, but I am working with small alpine lakes, and would, thus, like to work with the imagery that Planet has to offer for improved resolution and temporal replication.  At this stage, I find that I am struggling a bit with even knowing what to ‘google’ for help, so any advice or pointers in the right direction would be greatly appreciated.  How should I decide which satellites to use (e.g., Dove R, Super Dove,

4
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1 year ago
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Javier Muro‎‎ 🌱
asked in PlanetScope
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 

1
mirons
Planeteer 🌎
1 year ago
L
Leikun Yin‎‎ 🌱
asked in PlanetScope
Only three bands valid for Planet Basemaps "global_monthly_yyyy_mm_mosaic"

Hi,I have a problem with the NIR band when I used the product "global_monthly_yyyy_mm_mosaic". It seems like it has four bands (RGB+NIR) band but the NIR contains only the value 255. I am not sure this is  a technical issue or this product only has three bands available.Thanks for your help!

1
Pooja Pandey
Planeteer 🌎
1 year ago
L
Léo Rasse‎‎ 🌱
asked in PlanetScope
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

6
elyhienrich
Community Manager 🌎
1 year ago
Y
yongjun.song‎‎ 🌱
asked in PlanetScope
Question with azimuth angle of PlaneScope data

Hello,I just want to know the satellite azimuth information for PS2.SD L1B images which I downloaded.I found that there are two types of metadata: GeoJSON metadata and General XML metadata.And the definitions of the "satellite_azimuth" in GeoJSON metadata and "azimuthAngle" in General XML metadata are quite different. In case of "azimuthAngle" in General XML metadata, "azimuthAngle" means "The angle from true north at the image to the scan (line) direction at image center, in clockwise positive degrees" from the PLANETSCOPE PRODUCT SPECIFICATIONS document.The "orbitDirection" of my PS2.SD L1B image is "DESCENDING" so I thought the scan (line) direction must be equal to a direction like following figure in consideration of how PS2.SD image composite were made.However, I found that "azimuthAngle" is 1.203555e+01 in General XML metadata and it doesn't make sense because I think “azimuthAngle” must be at least over 90º.So, I want to know what I missed...Thanks. (I used ‘20190408_015325_76_

3
Mariana Curdoglo
Planeteer 🌎
1 year ago
deanesh.ramsewak
deanesh.ramsewak🌲🌲🌲🌲
posted in PlanetScope
Using Planet data to map coral reefs in Buccoo Reef, Tobago

Hello everyone, my team and I are utilizing Planet data for reef assessment in Buccoo Reef, Tobago. Reefs in the Caribbean region have suffered a substantial loss of 60% - 80% since 1970s and Tobago have been severely affected. We hope to use our results to implement monitoring and management strategies for the Buccoo Reef.  Here is a similar paper that I’ve found using Planet Dove Satellites for reef assessment: https://zslpublications.onlinelibrary.wiley.com/doi/full/10.1002/rse2.42 Excited to post our results soon! 

4
deanesh.ramsewak
1 year ago
Milad Niroumand-Jadidi
Milad Niroumand-Jadidi🌲 🌲
asked in PlanetScope
Number of Doves and SuperDoves in Orbit?

Hi, I was wondering how can I get some info about the latest number of Doves and SuperDoves in the orbit? I know that the numbers are changing due to quite frequent launches of new satellites. I need this info separately for Doves and SuperDoves. Thanks

2
Milad Niroumand-Jadidi
1 year ago
elyhienrich
Community Manager 🌎
elyhienrichCommunity Manager 🌎
asked in PlanetScope
Future Flight Path

This question was originally asked April 11, 2022 03:38 by user Jasper Braakman.Is it possible to know the flight path schedule of the planet satellites in advance? I need to determine the ground truth by going outside at the same time as the satellites. However, for this, I need to know when to go outside in advance. Is this possible?

5
deanesh.ramsewak
1 year ago
elyhienrich
Community Manager 🌎
elyhienrichCommunity Manager 🌎
asked in PlanetScope
Is it possible to fire POST with different product bundles?

This question was originally asked June 09, 2022 06:09 by user Timur Myrzagaliev: Hi, everyone! I am interested in downloading both 'visual' and ''analytic_8b_udm2" at the same time (making one order instead of 2). Is it possible to do? if yes how should the payload be correctly generated? Ref: https://developers.planet.com/docs/orders/tools-toolchains/  

2
deanesh.ramsewak
1 year ago
Milad Niroumand-Jadidi
Milad Niroumand-Jadidi🌲 🌲
asked in PlanetScope
Are there different generations of SuperDove sensors?

Hi,I would like to know more about the consistency of the data acquired by different SuperDoves. Are there different generations of SuperDoves with relatively different radiometric characteristics or all of them are exactly the same sensors? If they are different, are the harmonization parameters available to match the SuperDove data from one to another one? I know there are harmonized data with respect to Sentinel-2 but this product seems not accurate over water bodies particularly rivers. So, I need a means of harmonizing the SuperDove data relative to each other.Thank you! 

9
Milad Niroumand-Jadidi
1 year ago
C
Chithrika Alawathugoda‎‎ 🌿
asked in PlanetScope
Center Wavelengths for 8-band products and 4-band imagery

Good Day Planet Community !Please let me know the center wave lengths for Planet Scope imagery for 8 bands and 4 bands. This is required in the SCP plugin in QGIS, for classification. Thank you for the support.

6
deanesh.ramsewak
1 year ago
M
Michael Ogungbuyi‎‎ 🌱
asked in PlanetScope
Using PlanetScope Surface Relectance To Monitor Pasture Biomass

Hi Community,I would like to ask if there are existing published articles on using PlaneScope 8 bands to monitor pasture biomass? I am interested in investigating on what the new red edge band can do in monitoring above ground biomass for pastures/grassland. Your feedback will be appreciated. Thank you community.

3
deanesh.ramsewak
1 year ago
N
norm.campbell‎‎ 🌱
asked in PlanetScope
Data Quality Reports

Can the Data Quality Reports be updated so that the scatter plots of PlanetScope (PS) reflectance against RadCalNet are for the current quarter, and not historical?Would it be possible to plot the reflectances (for PS and RadCalNet) against time for each band for each RadCalNet site separately***, so that users can see the variation from day to day in the satellite reflectances, and compare them with the fluctuations in the RadCalNet values. It would be interesting to add the Sentinel 2 spectral data, as in Figure 15 of the 2022-Q1 Report.Where can I find definitions of Absolute Accuracy, Precision and Uncertainty (see Table 1). PS Is there a tag for Data Quality? *** and / or make the data values available in a Table in an Appendix, so that users can plot the values.

4
deanesh.ramsewak
1 year ago
M
moakhan‎‎ 🌱
asked in PlanetScope
Planet Scope and Rapid Eye Images

Hi Guys. I am new to the Planet University. I am looking for Planetscope and RapidEye images for Dec 2016. Where can I find these images?Best Regards,Arshad 

3
deanesh.ramsewak
1 year ago
elyhienrich
Community Manager 🌎
elyhienrichCommunity Manager 🌎
asked in PlanetScope
Basemap Quads Vector Map

This question was originally asked April 12, 2022 20:43 by user Shengbiao Wu. Hello,I want to search and download basemap quads. My study area has many small patches. I need to search them from Mosaic Quads too many times using AOIs to get the download URLs. Is there any quad vector map (e.g. shapefile) with tile IDs like other satellites (e.g. Sentinel's Military Grid Reference System (MGRS) and MODIS' Sinusoidal Tile Grid) available for the users? Using such a vector map, users can determine their target quads easily just by overlapping their study area map with the quad vector map. Thanks for your help.

2
deanesh.ramsewak
1 year ago
elyhienrich
Community Manager 🌎
elyhienrichCommunity Manager 🌎
asked in PlanetScope
Downloading partial images

This question was originally asked June 07, 2022 09:59 by user Haiyan Huang.  Hi ,I uploaded a shapefile to search the images, at the edge of the shapefile, not the whole planet images are within the shapefile. Is it possible to only download the partial images that fall in the shapefile?Best,Haiyan

2
deanesh.ramsewak
1 year ago
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