Questions tagged [date]

Time stated in terms of the day, month, and year.

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4
votes
1answer
63 views

Converting string column to datetime column in QGIS

I have an attribute column that has a string datetime and I want to convert that to a date column. I first attempted to simply add the time column in an expression, and I only got the year/month/date, ...
2
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2answers
39 views

to_date arranging dd/MM/yyy

I have a column as a string 10/12/2020 13:14:39 I want to convert it to Date format (I'll do that using the refactor tool later). First I need to rearrange this so the time is discarded and the dd/MM/...
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1answer
21 views

How to prevent ArcGIS Pro Arcade expression adding one month on to my desired date?

I am trying to add dates to two date fields in ArcGIS Pro using expressions in Arcade. When I use the expression Date(2020,10,29) the result in the field is 29/11/2020, which is one month later than ...
1
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1answer
21 views

Formatting date inside ArcGIS Online Indicator widget

In my data I have a field in "date" format. The data source is a survey123 layer. I am not able to format the appearance to just year, month, day. In the widget the Time and pm or am is ...
2
votes
1answer
52 views

Making file path part variable using Python [closed]

I am creating a python script to help automate updates. I am just wondering does anyone know how to make part of my file path a variable, as each month the python script will run via a different file ...
3
votes
2answers
122 views

Adding number of months (as integer) to date format in QGIS

I am creating a form for QFIELD in a QGIS project. I have three fields: Date of today ([$now]), as a date format, Number of months allocated for a certain task, as an integer The due date for this ...
0
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0answers
27 views

Text to date field conversion

in QGIS I created a point layer with a field which was initially set as text. For each feature, I wrote in that field a date: "yy.mm.dd". I then modified the field to "date" with a ...
1
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1answer
31 views

Filtering Sentinel-5P from metadata on Google Earth Engine

I need a S5P image from a spesific date. Is there any way to filter image collection based on the metadata on GEE so the result is only from an image. I've tried something like: var collection = ee....
2
votes
1answer
104 views

Finding the date when a specific polygon was created using ArcGIS Desktop

I have a shapefile of polygons. Polygons were created in different times (digitized on raster image). I would like to determine the date that specific polygon was created. Is there any tool that can ...
0
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0answers
35 views

QGIS temporal animation with date values in different columns

I'd like to create a time series animation in QGIS 3.14. My data is structured in a way that the dates are given by the field names. I have field names like "country_name", "1/15/20&...
0
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1answer
39 views

Finding out when image added to ImageCollection of Google Earth Engine

I am trying to figure out when an image (or observation in general) was uploaded to Earth Engine. I have a script that gives me the most recent image date, but as far as I can see this refers ...
1
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1answer
76 views

Converting text field to date field in ArcGIS Pro

How to convert date, which is in text formated field to date formated field? Also, there is dates which have only year, without days and months and empty fields. I've tried Convert Time Field. But it ...
0
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1answer
34 views

Where is date information in OpenStreetMap data files?

I would like to access temporal information from OSM datafiles (not the changeset file) Files *.osm.pbf downloaded from the GeoFabrik website or another OSM mirror do not show the following ...
0
votes
1answer
80 views

Converting raster stack or brick to ts time series object to run in BFAST

# created rasters from .tif file (r1,r2,r3,r4,r5,r6,r7)‎ ‎# created raster stack‎ r_stack <- stack(r1,r2,r3,r4,r5,r6,r7)‎ class : RasterStack ‎ dimensions : 743, 1893, 1406499, 7 (nrow, ncol,...
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2answers
74 views

Sorting raster stack by dates in R

I need suggestion on how to sort a raster stack by dates. A reproducible example is in the following: library(raster) Create a reproducible rasterstack; set.seed(123) r1 <- raster(nrows = 6, ncols ...
1
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1answer
55 views

Attribute table conversion date format

I want to change the date format with different date formats in the attribute table to the one format which is fitting for the Time manager. Does it work with the field calculator? For example 12....
0
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1answer
21 views

Restructure data.frame By Date Values in R [closed]

I have a data.frame in R shown below.. This data.frame summarizes counts by week for every year in a time series dataset. I am now trying to rearrange this matrix such that the years (2001-2020) will ...
0
votes
1answer
127 views

Converting Unix epoch time to GMT time using QGIS Field Calculator

I am trying to convert the 'time' and 'updated' column from epoch to date/time GMT but I am struggling to do so. I know I have to use the field calculator tab but I am a basic at using scripting. I am ...
2
votes
1answer
93 views

Using Field Calculator to Combine Month, Day, Year into Date

I merged 2 layers in QGIS and am trying to clean up the attribute table using the Field Calculator. One layer has 1 column called Date in the format YYYY-MM-DD. The other layer has 3 separate columns ...
1
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0answers
30 views

Date format conversion brings an unexpected empty space between the date parts

I always used the formula (below) in Python Calculator to convert the date format from Julian to Gregorian format. But,now a weird behaviour is happening and I am trying to figure out what is wrong in ...
1
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1answer
71 views

Filter Image Collection by date with conditions

I want to filter my ImageCollection for my analysis with specif time ranges. I have an Image Collection with annual max NDVI images ranging from 1982 - 2015 and a conflict FeatureCollection for a ...
0
votes
1answer
125 views

Trouble with using Freemarker to formate Date for GeoServer GetFeatureInfo

I'm having some trouble while trying to use the Freemarker Template to display dates in the desired format. I store points with a date information in a PostGIS database written through an FME-process ...
1
vote
1answer
118 views

GEE: date list to filter an image collection in Google Earth Engine

I have a CSV with a column of dates. I already imported the CSV, but I would like to know If I could use that column to filter an Image Collection. Just now, I wrote all dates and used a filter to ...
1
vote
2answers
72 views

GROUP BY clause causing ArcGIS to crash

I am attempting to find the most date for each occurrence in a given county. I am attempting to do so with a SQL expression, but every time I add a GROUP BY clause ArcGIS crashes (I am doing the work ...
1
vote
1answer
20 views

Using Python to label points with format dependent on date of measurement in ArcMap

I have a database of wells and water level measurements which I would like to label in a stacked manner with the ID on top and the measurement below it. If the measurement is from 2020, it should ...
1
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2answers
461 views

How to get current date “YYYY-MM-DD” in string format in GEE script

I tried to get current "YYYY-MM-DD" in Google Earth Engine script. I succeeded to get current "YYYY-MM-DD" in "Date" format in GEE script. But I want to convert it to String format for setting as a ...
2
votes
1answer
214 views

Change date format into readable format in GEE

I have code in GEE which create table with the sentinel2 mean NDVI data for certain period. my problem is that the table in the end has two column with the dates, one is the name of each image (not ...
1
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0answers
23 views

Image Age Information of XYZ Base Map in QGIS

Is there a way to find the age of the imagery of a base map via pyqgis? Any help on this would be much appreciated.Thanks.
1
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0answers
179 views

Using ArcGIS Pro to select all data collected “Yesterday” regardless of the time of day

I am using ArcGIS Pro 2.4.3. I can upgrade if needed. I am reading a hosted feature layer from my Organisation's AGOL site in ArcGIS Pro. This is using the standard Esri Data Store. This dataset ...
2
votes
2answers
524 views

Filter image collection to one specific date (Earth Engine)

I'm using GEE and I have many codes were I filter my imagecollection by using filterdate (and then I have date range) and then I work with the first image in the imagecollection, when I know from the ...
2
votes
1answer
40 views

Optimal way to estimate date range of an ImageCollection in Earth Engine

What is a most straightfoward way to get a date range of an ee.ImageCollection as formatted date strings? For example, ee.ImageCollection('LANDSAT/LT04/C01/T1_32DAY_EVI').get('date_range') returns [...
0
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0answers
12 views

Extracting the dates of Google Earth Pro VHR images using a grid?

I am doing a study on land use change and needed to quantify the bias due to poor coverage of some regions. First I would like to know if this is an issue at all in my case study. I have a ...
2
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0answers
27 views

Why the data type of date column is showing as string in QGIS but back in csv file it is date type?

I have created a .csvt file as name as same csv file and placed in same directory. After that data type of date column are showing as a date type but when I am checking it in attribute table values ...
2
votes
2answers
70 views

Getting top 1 record from shapefile by descending order using ArcPy SearchCursor

I have a shapefile from the date field in it. I'm looking to get top 1 record date value by descending order. readRows = arcpy.SearchCursor(shapefile, "", "", "Last_Updated" ,"Descending") Is ...
0
votes
1answer
24 views

Adding Thirty years to date field using ArcGIS Pro Field Calculator

I have 2 fields one is Creation Date the other is Maintenance Date. The Maintenance Date should be 30 years after the Creation date. I have been trying to use the field calculator for this. But I ...
0
votes
0answers
118 views

Getting week number from date using Arcade with ArcGIS Online

How can I get the week number (week position in year) from a date with ArcGIS Online’s Arcade?
2
votes
1answer
65 views

Add date to an image collection to export to CSV

I calculate the number of fires for a region and export the result to Google Drive as a CSV file, but I can't add the date to the image collection to export, it gives the following error: ...
2
votes
0answers
33 views

GEE - Get date of ImageCollection mosaic

I have created mosaics by date from an ImageCollection and now want to label each mosaic with its corresponding date. This is my function to label the ImageCollection: var date_label_pos = ee....
3
votes
1answer
85 views

Custom form with QT for QGIS 3.4, Date edit Widget, Null value

I made a custom form for QGis with QT-designer and I have a problem with the Date-Widget. When I create a form in QGIS with drag and drop or automatically, then it works: Fore a date-field I can ...
1
vote
1answer
240 views

Datefilter in leaflet.js

How do I filter data by date. If I want to filter, I can see the old filtering too. The layers are stacked on top of each other. How do I get the current date range. <div id="time-ranges" class="...
0
votes
1answer
319 views

Difference between `system:index` and `system:time_start` properties in Google Earth Engine

If I want to know the date of image acquisition, would it be the system:index or system:time_start property? I'm afraid I have been created a mess and used wrong dates. For example, if I have this ...
1
vote
1answer
34 views

Python code snippet to label years (e.g. 2015) and not label anything with a 0

I've been unable to solve this seemingly rudimentary issue of running a python snippet via the label expression option in ArcGIS. I've read this documentation Building label expressions, but wasn't ...
0
votes
1answer
57 views

Date of reference in an feature collection

I am pretty new on GEE and idk how easy is this task. I want to find daily precipitation for all Brazilian municipalities in 2006. I applied a map function with reduce regions and end up with a ...
4
votes
2answers
201 views

Obtaining date data from layer name in QGIS

I have a column with name of the satellites image background (Landsat, Sentinel), in this name I have a date information into the text. How do I extract the date data from this text?
1
vote
1answer
256 views

GEE error when extracting image timestamp

I have filtered Sentinel 2 images to get suitable cloud free images from the time period I require, however I cannot figure out how to extract the date from the images, but with my current code I get ...
1
vote
1answer
46 views

Adding time band as year to NDVI composite

I try to add time band to my NDVI time-series and using this function (took it from developers guide), for regression calculation. It looks like script is working but magnitude of slopes is extremely ...
7
votes
2answers
418 views

QGIS 3.4 calculate date, add month

I want to add a number of months to a date to get a new date. I have a date-field "date", an integer-field "months" and a date-field "new_date". I want to calculate the "new_date" by adding the "...
0
votes
1answer
128 views

Definition Queries for most recent date in ArcGIS Pro

I have a feature class containing sample results for locations that includes thousands of records. Many of these are overlapping and have the same location ID. I need to label each sample based on the ...
1
vote
1answer
505 views

Calculate date difference (days) with expressions (QGIS)

I would like to calculate the number of days between two dates. The first date is written in attribute table [YYYY-MM-DD] (creation date) and the second is today [now()]. The goal is, to get the age ...
1
vote
2answers
108 views

Which time format does ESA use for Sentinel-3 file names?

regarding the ESA Sentinel-3 file name convention I have got a question; which time zone (GMT, CEST, ...) does ESA use? I could not find anything yet, even it should be a critical point for many users....

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