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Geographic Information Systems

Questions tagged [time]

A nonspatial continuum in which events occur in apparently irreversible succession from the past through the present to the future

248 questions
info Newest Frequent Votes Active Unanswered
-3
votes
0answers
13 views

Discrete Global Grid Systems : implementation examples? [on hold]

As part of a Discrete Global Grid Systems (DGGS) ‘s state of art, I have to analyse some land and marine oceanographic use cases. That’s why I venture to write to you and ask following questions. ...
-2
votes
0answers
17 views

Pixel-Level NDVI : what is it

I have basic knowledge on how to compute floating or integer based NDVI value of an AOI on daily, weekly, monthly or yearly scenes BUT do not understand what is meant by pixel-level NDVI value. ...
1
vote
0answers
18 views

How to include duplicate samples (same locations, different temporal sampling) in Geographically Weighted Logistic Regression? [closed]

I want to assess local most important predictors for a specific event within a region. The same locations (grid) were all sampled in two different time occasions. I am assuming predictors to be ...
3
votes
0answers
34 views

Time series condition through field calculator [closed]

I am attempting to filter some time stamped data which I have enabled through the Convert Time Field tool, depending on a true/false condition. I am doing this through the field calculator within ...
0
votes
1answer
31 views

Measuring Distances between Points with the same timestamps using QGIS

I'm facing the Problem that I want to calculate flight distances of Red Deer. I have a Layer with point Locations of animals; One attribute is the timestamp. I have another layer with point locations ...
2
votes
0answers
19 views

Does GPGGA have leap second correction?

I'm trying to use GPS clocks to synchronize some measurements and I'm a little confused about the leap second correction between GPS time and UTC. I was wondering - does the GPGGA NMEA header have the ...
0
votes
1answer
37 views

Selecting points in polygon in a range of time (ArcGIS)

I have: - point GPS for people (time in seconds) - buffer GPS for a car (time in seconds) What I want to do is for each buffer GPS coordinate, I want to find the number of GPS people points inside ...
0
votes
1answer
49 views

Using raster stack function time in R?

I successfully ran a function over a smaller test raster stack (48 layers) in about 30 minutes but cannot run it over my large stack (1462 layers). The last one I tried over the large stack ran from ...
0
votes
1answer
30 views

Google Earth Engine -hourly timestep

Does anybody know how to select 3-hourly time steps in a dataset on Google Earth Engine? Here is what I have tried // A function to compute CF_solar for every time step at which irradiation and ...
1
vote
0answers
43 views

Unsupervised classification in ERDAS imagine

I am trying to make a classification to run some index ( like NDVI) to see the change over time using the image difference function. Is it possible to do an unsupervised classification on one image ...
1
vote
2answers
55 views

Converting 12-hour time to 24-hour time in QGIS

I have a data set with hours such as 8am to 6pm. I would like to convert this from 12 hour clock format into 24 hour clock format. So instead of "8am to 6pm" I would want "08:00-18:00" Does anyone ...
4
votes
1answer
51 views

How to determine the right time of Landsat 8?

Sorry, please help me clarify this issue. Assume that I have information from a Landsat 8 image with the time shown as below: Start time: 2018:288:03:13:25.1532590 Stop time: 2018:288:03:13:56....
0
votes
1answer
67 views

How to calculate the Min & Max value for a pixel from multiple Raster Images?

I have downloaded a Bunch of MODIS MOD13Q1.006 Images for my Study Area, covering a period of 4 years (same scene across time). Now I want to calculate the Min & Max NDVI value for each Pixel, so ...
0
votes
1answer
25 views

How to get the most current data from a Temporal Feature Service?

I have created a Temporal Feature Layer on our ArcGIS Server, which records all the locations, along with timestamp & other attributes of moving vehicles. I used the TimeSlider Sample, to create ...
0
votes
0answers
13 views

Enable time in related tables on ArcGIS Pro

Is there an option for user to enable time in related tables, then make a relationship class with another layer? Example: Tables I have: 1) Tax report from 2016 Parcel number, Tax revenue, year 1,...
0
votes
0answers
20 views

How to make 3D Path Lines in ArcPro?

Ok here's what I want to create: I'm not quite sure if they have a name (space-time paths?), but it would essentially be a map of the paths individuals took with the time variable being vertical. If ...
1
vote
3answers
63 views

Converting hours to acceptable FME format?

I have an Excel document with a 'time' column. I need to get this column into an appropriate format for FME to convert the values to minutes. The problem is that the cells are in different formats (h:...
0
votes
1answer
20 views

Unable to update time frame on layer in ArcPy?

I'm working on a script to ingest some data, create some data layers with it, and publish that to ArcGIS Server. Most of that is done with no problem, but I got a new requirement today, time-enabling ...
0
votes
0answers
19 views

Time lapse not showing features ArcMap 10

I am trying to use ArcMap 10 to visualize air quality data. I have created a shapefile with values of measurements of PM2.5 on an interval of 15 minutes each. The total data accounts for circa 3000 ...
0
votes
0answers
29 views

Satellite image of a specific location at a specific time frame

I like to know where can i find a series of satellite images (day and night) of a location during a specific time frame?
1
vote
1answer
32 views

Select Entrys by Time

I want to select entries of my GPS-Point data only recorded from 7 a.m. to 7 p.m. and close out all others. Right now, its in a String format (00:00:06). I tried "time": >= '07:00:00' and "time": &...
0
votes
0answers
95 views

Adding a timestamp with only hour information to a kml file

I have a program that creates kml files with heat maps made up of differently colored Placemarks. I'd like to create heat maps based on the data points from a certain time slot and show these in ...
1
vote
0answers
57 views

Change polygon color over time by number of events in polygon

In ArcGIS Desktop 10.5.1, I have a layer of XY events with a date field, and a layer of polygons. I have spatial joined the points so that each event is associated with a polygon. I want to show the ...
4
votes
2answers
375 views

Changing shapefile's field type using fiona?

I need to have a layer time-enabled for Esri application-making. Coming from the source, it has an int type column called year. I need to find a way to automate its conversion to date. I first tried ...
1
vote
0answers
64 views

2.5D rendering time in QGIS

I have QGIS V 2.18.18 I am practicing making 3D maps and decided to do a simple population density 3D map for the states and territories of India. I have a shapefile that contains 36 features(States ...
0
votes
0answers
33 views

ArcGIS Pro ModelBuilder stops execution on warning

I created a model in ArcGIS Pro 2.1.2 that reads data from a csv file and moves it to a Feature Class. The next part in the process is to convert one of the fields (name:time type:Text) into a new ...
1
vote
1answer
103 views

Time-Aware Layer from ArcGIS Pro is not working in ArcGIS Online

I am using ArcGIS Pro 2.1 to share a web map with time aware layer on AGOL. When I publish the web map I get no errors but the field for time is missing when I open the map online. The time slider ...
1
vote
0answers
53 views

Showing change of lot division/ownership over time?

I am new to GIS programs and using ArcGIS Pro. I am mapping a neighborhood and looking at creating a detailed database of the ownership history. Currently I have the lots configured to have an ...
2
votes
1answer
123 views

How to add time in geoserver layer with gsconfig

Find below the code I use to add a raster to geoserver through python3 with gsconfig-py3 (1.0.7) What I do from geoserver import catalog from geoserver.util import shapefile_and_friends from ...
0
votes
1answer
33 views

Changing Carto basemap according to timestamp?

I'm making an animated "time-map" of the avaibility of renting bikes during a day (on Carto). Can I change the basemap so when it's day time the basemap is light and when it's night time the basemap ...
3
votes
0answers
58 views

Is it possible to add the time of editing to the table of a shapefile? [duplicate]

I would like to automatically track the time when a point is created or edited. I first thought about virtual fields and the now() function. However, that field always contains the current time. So ...
2
votes
0answers
56 views

Processing time for Euclidean Distance [closed]

I am running a Euclidean Distance analysis on a large file. I have a polygon layer that includes all Urban areas in Canada, US, and Mexico merged into one multipart polygon file. I am attempting to ...
1
vote
0answers
41 views

Map service is published with wrong time info settings

I have a mosaic dataset and it contains GRIB data sets. I want to publish this dataset as a time aware map layer. For this I use ArcMap 10.5.1 and ArcGIS for Server 10.5.1 on Windows. Unfortunately I'...
1
vote
1answer
588 views

Calculating drive time in QGIS

I have more than 3000 points that spread in in a very big area. I need to find all the points (blue) that are in distance of 50 minute drive time, from the stores (green stars). I want to calculate it ...
1
vote
1answer
86 views

TimeManager UnsupportedFormatException

I am trying to use time manager to show patterns of movement for tagged wildlife. I have a GPS point with time and date every two hours. Then, I select the layer with time manager, and select the ...
2
votes
1answer
110 views

Use Milliseconds on Time Manager

I am trying to use Timemanager with my csv files which i loaded on my map as shp layer. those contain time staps which i tried in hh:mm:ss.fff hh:mm:ss:fff hh:mm:ss,fff and also each with 1 f - in the ...
0
votes
1answer
198 views

LeafletSlider plugin doesn't work

I downloaded the LeafletSlider repo https://github.com/dwilhelm89/LeafletSlider to test it out and then modify it to my needs, but when I open the index.html it doesn't have the slider as shown in the ...
-1
votes
1answer
831 views

Why meridian time zones are not uniform?

Looking at this image: Why are time zones are not uniform? (I mean not really parallel !!). For example, time zone -11 and -10 are pretty overlapping near Alaska and time zone 0 changes the form ...
0
votes
0answers
336 views

How to do spatio-temporal kriging with irregular data?

I would like to predict a metric variable based on (two-dimensional) spatial and temporal correlation using R. In other words, I would like to obtain a spatially and temporally weighted interpolation ...
2
votes
1answer
159 views

Merging 2 Isochrone Maps

Through the OpenRouteService, I've generated 2 driving time maps from 2 points approximately 60km from each other. Screenshots below - each colour represents 10 minutes. I'm trying to find the 'half ...
1
vote
1answer
70 views

Displaying time in the Date Field

How would one go about displaying the time that a feature was edited or digitized in a date field so as to display MM/DD/YYYY 12:00:00 AM in the attribute table?
0
votes
0answers
97 views

How to georeference different time layers of Landsat 8 for a target area?

The issue is that my target area from different days doesn't overlap each other. When I use UTM coordinates to reference instead of Lat-Lon values, the results are even worse. Here I describe my ...
1
vote
0answers
76 views

Is it possible to combine buffer zone analysis with time series analysis in QGIS?

There is a multitemporal analyzer in QGIS where it is possible to do a buffer zone analysis combined with time series analysis, where there are two layers an input layer and a target layer and the ...
2
votes
1answer
40 views

Symbolizing a file geodatabase layer using every attribute field?

I'm trying to export an animation using ArcGIS 10.3.1. I have monthly unemployment rate data dating back to 1990 for every county in the continental US. Each month's unemployment rates are stored in a ...
3
votes
1answer
104 views

Inconsistent performance using the tiger geocoder.

I'm testing the geocoder results for one state, and I'm getting different results for directions that seem to be well formatted. E.G. Geocoding these addresses is taking around 100ms each: 280 ...
5
votes
1answer
375 views

Converting DateTime field to another time zone?

I'm using QGIS 2.16.3 and attempting to convert a number of datetime fields that are appearing in the incorrect default GMT +0 timezone. I would like to add, for example, 10 hours to accurately ...
2
votes
2answers
741 views

Iterating Create NetCDF Raster Layer in ModelBuilder?

Recently I have updated my ArcGIS to 10.5 and I got stuck with a process that I used to do a thousand times before in 10.2.2 version. I need to calculate zonal statistics from rasters stored in ...
0
votes
1answer
41 views

Carto Builder, show attribute readout synced to time data in animated map?

I'm working on a donated webmap animating time data, the progress of small electric boat across the ocean. The time field for animation is a time in seconds counter from launch attribute. The data ...
4
votes
1answer
88 views

Counting points around a point conditional on time values

I want to count the number of points from one layer around each point from a different points layer. The thing is that each point (from both layers) has an "entrance date", so I want to count only ...
0
votes
1answer
63 views

Calculate the time spent by a user creating changeset [closed]

Is there a way to calculate the time spent by a user while creating a changeset? The OSM Changeset file (i.e. map.osm) has timestamp, changeset, user fields. Can the timestamp filed values be ...

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