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

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30
votes
3answers
3k views

How to represent trend over time?

I have a time series of rasters where the cells of each raster represents some value at a certain time. I'd like to generate a map that highlights the magnitude of positive or negative trends in this ...
5
votes
2answers
404 views

How to apply ArcGIS time slider on Multiple Data Frames at once?

Is there a way to use the Time Slider on multiple data frames simultaneously? Example: My Dataframe 1 shows precipitation values over an area and DataFrame 2 shows corresponding temperature.. I want ...
33
votes
9answers
4k views

Visualisation of spatio-temporal data set?

I'm investigating visualisation of a spatio-temporal data-set. What examples are available, online or offline, of high-quality spatio-temporal data visualisation?
6
votes
2answers
163 views

How to speed up this script in QGIS?

I am a new in PyQGIS, I want to create a Point layer from a raster layer. In table of point layer created, there is 3 fields by name of "X_coord", "Y_coord" and "Azimuth", each point in Point layer ...
4
votes
1answer
2k views

How to compare 2000 Census block group data with 2010 block group data?

I want to calculate the percent change for median household income in Los Angeles at the block group level from 2000 to 2010. Someone told me I have to reaggregate 2000 block data to 2010 block group ...
10
votes
2answers
2k views

Interpolation for timeseries in ArcGIS Desktop?

I'm trying to calculate average rainfall value from a number of points using Inverse Weighted Distance tool in ArcGIS 9.3. My problem is that: each point has it own time series, therefore the ...
2
votes
2answers
3k views

How to use DateDiff() Function across day transition in ArcGIS Field Calculator?

I am trying to calculate the time difference between two fields using the DateDiff() function in minutes. I have successfully calculated the times that fall within the same day but I am having trouble ...
5
votes
2answers
766 views

Binding between QGIS custom form (Qt Designer) and date/time field in a SpatiaLite database table

For my attribute table I created a custom form in Qt Designer. The table has a date field and a time field. In Qt Designer there are widgets for entering date and time. But what data type is expected ...
2
votes
1answer
71 views

Adding time value into network model of ArcGIS Network Analyst?

I am trying to set up a network model in ArcGis 10.3.1 so that I can find a route which will also give the time in minutes. The tutorial guide says this is set up in the attributes of the network ...
2
votes
1answer
696 views

Adding frequency (count) of a point shapefile on an animated map?

I have a crime (point) data on a map which is animated via time slider using a 1-week-period. I see all the points I added without a problem, I also added a dynamic text indicating the time period on ...
1
vote
1answer
84 views

ExportToPNG with definition query for unique values?

I have a MXD with a layer that has a field that has many values. I need to export multiple layouts to PNG, applying a definition query to show the unique values for that layer. i.e. Just show the ...
0
votes
1answer
661 views

GeoServer + dynamic datapath layer

My app based on Mapserver contains dynamic layers and using PHPMapscript I modify MAPFILE->LAYER->DATA value based on a parameter that comes via GET. Or I could even use RegEXP in the LAYER->DATA ...
16
votes
4answers
693 views

How to handle TIME in GIS?

Is there any way or any idea on how to handle Time attribute in GIS? For example, which are the ways to specify that an object is at a place at a given time interval and them it is in another place ...
9
votes
3answers
2k views

Speeding up Python calculated timestamp field in ArcGIS Desktop?

I am new to Python and have started to create scripts for ArcGIS workflows. I am wondering how I can speed up my code to generate an "Hours" double numeric field from a timestamp field. I start with ...
14
votes
7answers
8k views

Which tools and methods can be used to create isochrones?

I'd like to get an idea for what's involved in creating isochrones for a series of sites, with a reasonable degree of accuracy to the estimates. A general outline would be great, though my scenario ...
10
votes
2answers
646 views

How to identify and simplify point clusters with regard to time in PostGIS?

I just started to work with spatial databases and I want to write a SQL(PostGIS) query for automatic generalizing of raw GPS-tracks (with fixed tracking frequency). The first thing I am wokring on is ...
2
votes
4answers
3k views

Creating a Time series NDVI map

I would like to create a NDVI Time Series map? How do I do that? The one I probably would like to have similar like this http://proceedings.esri.com/library/userconf/proc02/pap0593/p05931.jpg I ...
6
votes
1answer
159 views

How to store and serve data and its progress over time in GeoServer?

I recently started working with GeoServer and stored some shape files. I successfully can retrieve the data as JSON. The data I want to maintain in the database changes over time. I do not want to ...
1
vote
1answer
149 views

How to do spatial join which is also based on time using ArcGIS for Desktop?

I have a time series plot of house sales for 4 years, but in those 4 years some districts change. I was wondering if I need to split the data into 4 layers for each year in order to join them to their ...
6
votes
3answers
380 views

Can ArcGIS for Desktop auto populate Date Field with current date/time when feature is created?

I am using Arc Desktop 10.3.1 in a versioned environment. In the geodatabase for the service requests there is a field called Date Notified. I would like this field to be auto-populated with the ...
5
votes
1answer
629 views

How to create Sequential Animation of Polylines in ArcGIS10?

I have a data set consisting of sets of polylines which reflect movement of individual organisms in my sample within their habitat each day. I am trying to create an animation which cycles through the ...
4
votes
1answer
259 views

Is it possible to change the year range of time manager in QGIS?

I have a shapefile with a start and end time field, properly formatted. However my dates range from 1864-1995. When I try to use the shape file with the QGIS time manager plugin I keep getting this ...
2
votes
0answers
259 views

Modelbuilder - make service area layer

I made a model in the model builder (ArcGis) to make a service area layer (see figure). Now I want to run this tool for the same locations but for different hours. -> the results would be a feature ...
2
votes
2answers
885 views

Calculate Slope Between Pixels Through Time: A Time Series Trend Analysis

I have a 9 year weekly time series (~500 raster grids of equal cell size and extent). I'm interested in obtaining the regression line slope between pixels (Imagine stacking all 500 grids on top of ...
1
vote
0answers
66 views

Representing Geoserver's WMS-T as time-aware KML for GoogleEarth frontend

I'm using Geoserver to publish* sets of hourly raster imagery and fought for a while to get a working example of Time Aware KML accessing my Geoserver to enable GoogleEarth as a frontend. A snippet ...
0
votes
1answer
110 views

Create an Identify Route Locations tool that converts M values

I have a data set with many maritime routes that I would like to see the m values (time) for. ArcGIS's Identify Route Locations tool works exactly as I want it to, however, the m value displayed is ...
0
votes
0answers
149 views

Label changing with time slider using arcGIS

I have a list of lat/long locations with a time associated with them. With those locations I did a spatial join to find the total amount of points in each polygon. I would want to do is gradually ...