Esri query table tool1/3/2023 You can now change the symbology to make it more obvious that the layer represents high risk areas.ġ4. The result is a new layer added to the map. The tool runs to find the areas with the highest risk during a flooding event. Click Show credits to check the number of credits needed to run the tool. Using the map extent minimizes credit usage and processing time. ESRI QUERY TABLE TOOL FULLMake sure Use current map extent is checked and the full Houston city boundary is within view. Change the Result layer name to Highest Risk and add your initials to make the layer name unique within your organization. All the returned areas will be within a quarter mile of a flood zone.ġ2. Change the expression to Houston Census Tract Demographics within a distance of 0.25 Miles from HarrisCountyFloodZones. You can use the spatial relationships in the expression builder to incorporate proximity to flood zones into the expression.ġ0. This operator specifies that both criteria must be met for a census tract to be considered.Īll the risk areas need to be in or near the flood zones. The query is added to the expression with the operator and. Uncheck the Houston Census Tract Demographics to turn off the layer and make it easier to see the rest of the data.Ĩ. Click the arrow to return to the Contents pane view.ġ4. Your map should now have four data layers: Houston Census Tract Demographics, Hurricane Evacuation Routes, World Urban Areas, and HarrisCountyFloodZones.ġ3. Click the Add button to add the Houston Census Tract Demographics layer to your map. In the search bar, search Houston demographics owner:Learn_ArcGIS.ġ2. You’ll use this demographic data in your analysis.ġ1. Vehicle ownership can affect people’s ability to evacuate. Click the Add button to add the Hurricane Evacuation Routes layer from the Federal User Community to your map. In the search bar, search for hurricane evacuation routes.ġ0. One of the major factors in evacuations for Houston is the proximity to an evacuation route.ĩ. In the search bar, do a new search for HarrisCountyFloodZones owner:Learn_ArcGIS. Your analysis is based around responding to flooding events, so you want to incorporate flood zones as one of your criteria.ħ.
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